Calculus Examples

$6 \sqrt{y^{3} + 1} - 2 x^{1.5} - 2 = 0$

Step 1

Use $\sqrt[n]{a^{x}} = a^{\frac{x}{n}}$ to rewrite $\sqrt{y^{3} + 1}$ as ${(y^{3} + 1)}^{\frac{1}{2}}$ .

$6 {(y^{3} + 1)}^{\frac{1}{2}} - 2 x^{1.5} - 2 = 0$

Step 2

Differentiate both sides of the equation.

$\frac{d}{d x} (6 {(y^{3} + 1)}^{\frac{1}{2}} - 2 x^{1.5} - 2) = \frac{d}{d x} (0)$

Step 3

Differentiate the left side of the equation.

Tap for more steps...

Step 3.1

By the Sum Rule, the derivative of $6 {(y^{3} + 1)}^{\frac{1}{2}} - 2 x^{1.5} - 2$ with respect to $x$ is $\frac{d}{d x} [6 {(y^{3} + 1)}^{\frac{1}{2}}] + \frac{d}{d x} [- 2 x^{1.5}] + \frac{d}{d x} [- 2]$ .

$\frac{d}{d x} [6 {(y^{3} + 1)}^{\frac{1}{2}}] + \frac{d}{d x} [- 2 x^{1.5}] + \frac{d}{d x} [- 2]$

Step 3.2

Evaluate $\frac{d}{d x} [6 {(y^{3} + 1)}^{\frac{1}{2}}]$ .

Tap for more steps...

Step 3.2.1

Since $6$ is constant with respect to $x$ , the derivative of $6 {(y^{3} + 1)}^{\frac{1}{2}}$ with respect to $x$ is $6 \frac{d}{d x} [{(y^{3} + 1)}^{\frac{1}{2}}]$ .

$6 \frac{d}{d x} [{(y^{3} + 1)}^{\frac{1}{2}}] + \frac{d}{d x} [- 2 x^{1.5}] + \frac{d}{d x} [- 2]$

Step 3.2.2

Differentiate using the chain rule, which states that $\frac{d}{d x} [f (g (x))]$ is $f' (g (x)) g' (x)$ where $f (x) = x^{\frac{1}{2}}$ and $g (x) = y^{3} + 1$ .

Tap for more steps...

Step 3.2.2.1

To apply the Chain Rule, set $u_{1}$ as $y^{3} + 1$ .

$6 (\frac{d}{d u_{1}} [{u_{1}}^{\frac{1}{2}}] \frac{d}{d x} [y^{3} + 1]) + \frac{d}{d x} [- 2 x^{1.5}] + \frac{d}{d x} [- 2]$

Step 3.2.2.2

Differentiate using the Power Rule which states that $\frac{d}{d u_{1}} [{u_{1}}^{n}]$ is $n {u_{1}}^{n - 1}$ where $n = \frac{1}{2}$ .

$6 (\frac{1}{2} {u_{1}}^{\frac{1}{2} - 1} \frac{d}{d x} [y^{3} + 1]) + \frac{d}{d x} [- 2 x^{1.5}] + \frac{d}{d x} [- 2]$

Step 3.2.2.3

Replace all occurrences of $u_{1}$ with $y^{3} + 1$ .

$6 (\frac{1}{2} {(y^{3} + 1)}^{\frac{1}{2} - 1} \frac{d}{d x} [y^{3} + 1]) + \frac{d}{d x} [- 2 x^{1.5}] + \frac{d}{d x} [- 2]$

Step 3.2.3

By the Sum Rule, the derivative of $y^{3} + 1$ with respect to $x$ is $\frac{d}{d x} [y^{3}] + \frac{d}{d x} [1]$ .

$6 (\frac{1}{2} {(y^{3} + 1)}^{\frac{1}{2} - 1} (\frac{d}{d x} [y^{3}] + \frac{d}{d x} [1])) + \frac{d}{d x} [- 2 x^{1.5}] + \frac{d}{d x} [- 2]$

Step 3.2.4

Differentiate using the chain rule, which states that $\frac{d}{d x} [f (g (x))]$ is $f' (g (x)) g' (x)$ where $f (x) = x^{3}$ and $g (x) = y$ .

Tap for more steps...

Step 3.2.4.1

To apply the Chain Rule, set $u_{2}$ as $y$ .

$6 (\frac{1}{2} {(y^{3} + 1)}^{\frac{1}{2} - 1} (\frac{d}{d u_{2}} [{u_{2}}^{3}] \frac{d}{d x} [y] + \frac{d}{d x} [1])) + \frac{d}{d x} [- 2 x^{1.5}] + \frac{d}{d x} [- 2]$

Step 3.2.4.2

Differentiate using the Power Rule which states that $\frac{d}{d u_{2}} [{u_{2}}^{n}]$ is $n {u_{2}}^{n - 1}$ where $n = 3$ .

$6 (\frac{1}{2} {(y^{3} + 1)}^{\frac{1}{2} - 1} (3 {u_{2}}^{2} \frac{d}{d x} [y] + \frac{d}{d x} [1])) + \frac{d}{d x} [- 2 x^{1.5}] + \frac{d}{d x} [- 2]$

Step 3.2.4.3

Replace all occurrences of $u_{2}$ with $y$ .

$6 (\frac{1}{2} {(y^{3} + 1)}^{\frac{1}{2} - 1} (3 y^{2} \frac{d}{d x} [y] + \frac{d}{d x} [1])) + \frac{d}{d x} [- 2 x^{1.5}] + \frac{d}{d x} [- 2]$

Step 3.2.5

Rewrite $\frac{d}{d x} [y]$ as $y'$ .

$6 (\frac{1}{2} {(y^{3} + 1)}^{\frac{1}{2} - 1} (3 y^{2} y' + \frac{d}{d x} [1])) + \frac{d}{d x} [- 2 x^{1.5}] + \frac{d}{d x} [- 2]$

Step 3.2.6

Since $1$ is constant with respect to $x$ , the derivative of $1$ with respect to $x$ is $0$ .

$6 (\frac{1}{2} {(y^{3} + 1)}^{\frac{1}{2} - 1} (3 y^{2} y' + 0)) + \frac{d}{d x} [- 2 x^{1.5}] + \frac{d}{d x} [- 2]$

Step 3.2.7

To write $- 1$ as a fraction with a common denominator, multiply by $\frac{2}{2}$ .

$6 (\frac{1}{2} {(y^{3} + 1)}^{\frac{1}{2} - 1 \cdot \frac{2}{2}} (3 y^{2} y' + 0)) + \frac{d}{d x} [- 2 x^{1.5}] + \frac{d}{d x} [- 2]$

Step 3.2.8

Combine $- 1$ and $\frac{2}{2}$ .

$6 (\frac{1}{2} {(y^{3} + 1)}^{\frac{1}{2} + \frac{- 1 \cdot 2}{2}} (3 y^{2} y' + 0)) + \frac{d}{d x} [- 2 x^{1.5}] + \frac{d}{d x} [- 2]$

Step 3.2.9

Combine the numerators over the common denominator.

$6 (\frac{1}{2} {(y^{3} + 1)}^{\frac{1 - 1 \cdot 2}{2}} (3 y^{2} y' + 0)) + \frac{d}{d x} [- 2 x^{1.5}] + \frac{d}{d x} [- 2]$

Step 3.2.10

Simplify the numerator.

Tap for more steps...

Step 3.2.10.1

Multiply $- 1$ by $2$ .

$6 (\frac{1}{2} {(y^{3} + 1)}^{\frac{1 - 2}{2}} (3 y^{2} y' + 0)) + \frac{d}{d x} [- 2 x^{1.5}] + \frac{d}{d x} [- 2]$

Step 3.2.10.2

Subtract $2$ from $1$ .

$6 (\frac{1}{2} {(y^{3} + 1)}^{\frac{- 1}{2}} (3 y^{2} y' + 0)) + \frac{d}{d x} [- 2 x^{1.5}] + \frac{d}{d x} [- 2]$

Step 3.2.11

Move the negative in front of the fraction.

$6 (\frac{1}{2} {(y^{3} + 1)}^{- \frac{1}{2}} (3 y^{2} y' + 0)) + \frac{d}{d x} [- 2 x^{1.5}] + \frac{d}{d x} [- 2]$

Step 3.2.12

Add $3 y^{2} y'$ and $0$ .

$6 (\frac{1}{2} {(y^{3} + 1)}^{- \frac{1}{2}} (3 y^{2} y')) + \frac{d}{d x} [- 2 x^{1.5}] + \frac{d}{d x} [- 2]$

Step 3.2.13

Combine $\frac{1}{2}$ and ${(y^{3} + 1)}^{- \frac{1}{2}}$ .

$6 (\frac{{(y^{3} + 1)}^{- \frac{1}{2}}}{2} (3 y^{2} y')) + \frac{d}{d x} [- 2 x^{1.5}] + \frac{d}{d x} [- 2]$

Step 3.2.14

Combine $3$ and $\frac{{(y^{3} + 1)}^{- \frac{1}{2}}}{2}$ .

$6 (\frac{3 {(y^{3} + 1)}^{- \frac{1}{2}}}{2} (y^{2} y')) + \frac{d}{d x} [- 2 x^{1.5}] + \frac{d}{d x} [- 2]$

Step 3.2.15

Combine $y^{2}$ and $\frac{3 {(y^{3} + 1)}^{- \frac{1}{2}}}{2}$ .

$6 (\frac{y^{2} (3 {(y^{3} + 1)}^{- \frac{1}{2}})}{2} y') + \frac{d}{d x} [- 2 x^{1.5}] + \frac{d}{d x} [- 2]$

Step 3.2.16

Combine $\frac{y^{2} (3 {(y^{3} + 1)}^{- \frac{1}{2}})}{2}$ and $y'$ .

$6 \frac{y^{2} (3 {(y^{3} + 1)}^{- \frac{1}{2}}) y'}{2} + \frac{d}{d x} [- 2 x^{1.5}] + \frac{d}{d x} [- 2]$

Step 3.2.17

Move ${(y^{3} + 1)}^{- \frac{1}{2}}$ to the denominator using the negative exponent rule $b^{- n} = \frac{1}{b^{n}}$ .

$6 \frac{y^{2} \cdot 3 y'}{2 {(y^{3} + 1)}^{\frac{1}{2}}} + \frac{d}{d x} [- 2 x^{1.5}] + \frac{d}{d x} [- 2]$

Step 3.2.18

Move $3$ to the left of $y^{2}$ .

$6 \frac{3 \cdot y^{2} y'}{2 {(y^{3} + 1)}^{\frac{1}{2}}} + \frac{d}{d x} [- 2 x^{1.5}] + \frac{d}{d x} [- 2]$

Step 3.2.19

Combine $6$ and $\frac{3 y^{2} y'}{2 {(y^{3} + 1)}^{\frac{1}{2}}}$ .

$\frac{6 (3 y^{2} y')}{2 {(y^{3} + 1)}^{\frac{1}{2}}} + \frac{d}{d x} [- 2 x^{1.5}] + \frac{d}{d x} [- 2]$

Step 3.2.20

Multiply $3$ by $6$ .

$\frac{18 (y^{2} y')}{2 {(y^{3} + 1)}^{\frac{1}{2}}} + \frac{d}{d x} [- 2 x^{1.5}] + \frac{d}{d x} [- 2]$

Step 3.2.21

Factor $2$ out of $18 y^{2} y'$ .

$\frac{2 (9 y^{2} y')}{2 {(y^{3} + 1)}^{\frac{1}{2}}} + \frac{d}{d x} [- 2 x^{1.5}] + \frac{d}{d x} [- 2]$

Step 3.2.22

Cancel the common factors.

Tap for more steps...

Step 3.2.22.1

Factor $2$ out of $2 {(y^{3} + 1)}^{\frac{1}{2}}$ .

$\frac{2 (9 y^{2} y')}{2 ({(y^{3} + 1)}^{\frac{1}{2}})} + \frac{d}{d x} [- 2 x^{1.5}] + \frac{d}{d x} [- 2]$

Step 3.2.22.2

Cancel the common factor.

$\frac{2 (9 y^{2} y')}{2 {(y^{3} + 1)}^{\frac{1}{2}}} + \frac{d}{d x} [- 2 x^{1.5}] + \frac{d}{d x} [- 2]$

Step 3.2.22.3

Rewrite the expression.

$\frac{9 y^{2} y'}{{(y^{3} + 1)}^{\frac{1}{2}}} + \frac{d}{d x} [- 2 x^{1.5}] + \frac{d}{d x} [- 2]$

Step 3.3

Evaluate $\frac{d}{d x} [- 2 x^{1.5}]$ .

Tap for more steps...

Step 3.3.1

Since $- 2$ is constant with respect to $x$ , the derivative of $- 2 x^{1.5}$ with respect to $x$ is $- 2 \frac{d}{d x} [x^{1.5}]$ .

$\frac{9 y^{2} y'}{{(y^{3} + 1)}^{\frac{1}{2}}} - 2 \frac{d}{d x} [x^{1.5}] + \frac{d}{d x} [- 2]$

Step 3.3.2

Differentiate using the Power Rule which states that $\frac{d}{d x} [x^{n}]$ is $n x^{n - 1}$ where $n = 1.5$ .

$\frac{9 y^{2} y'}{{(y^{3} + 1)}^{\frac{1}{2}}} - 2 (1.5 x^{0.5}) + \frac{d}{d x} [- 2]$

Step 3.3.3

Multiply $1.5$ by $- 2$ .

$\frac{9 y^{2} y'}{{(y^{3} + 1)}^{\frac{1}{2}}} - 3 x^{0.5} + \frac{d}{d x} [- 2]$

Step 3.4

Differentiate using the Constant Rule.

Tap for more steps...

Step 3.4.1

Since $- 2$ is constant with respect to $x$ , the derivative of $- 2$ with respect to $x$ is $0$ .

$\frac{9 y^{2} y'}{{(y^{3} + 1)}^{\frac{1}{2}}} - 3 x^{0.5} + 0$

Step 3.4.2

Add $\frac{9 y^{2} y'}{{(y^{3} + 1)}^{\frac{1}{2}}} - 3 x^{0.5}$ and $0$ .

$\frac{9 y^{2} y'}{{(y^{3} + 1)}^{\frac{1}{2}}} - 3 x^{0.5}$

Step 4

Since $0$ is constant with respect to $x$ , the derivative of $0$ with respect to $x$ is $0$ .

$0$

Step 5

Reform the equation by setting the left side equal to the right side.

$\frac{9 y^{2} y'}{{(y^{3} + 1)}^{\frac{1}{2}}} - 3 x^{0.5} = 0$

Step 6

Solve for $y'$ .

Tap for more steps...

Step 6.1

Add $3 x^{0.5}$ to both sides of the equation.

$\frac{9 y^{2} y'}{{(y^{3} + 1)}^{\frac{1}{2}}} = 3 x^{0.5}$

Step 6.2

Multiply both sides by ${(y^{3} + 1)}^{\frac{1}{2}}$ .

$\frac{9 y^{2} y'}{{(y^{3} + 1)}^{\frac{1}{2}}} {(y^{3} + 1)}^{\frac{1}{2}} = 3 x^{0.5} {(y^{3} + 1)}^{\frac{1}{2}}$

Step 6.3

Simplify the left side.

Tap for more steps...

Step 6.3.1

Cancel the common factor of ${(y^{3} + 1)}^{\frac{1}{2}}$ .

Tap for more steps...

Step 6.3.1.1

Cancel the common factor.

$\frac{9 y^{2} y'}{{(y^{3} + 1)}^{\frac{1}{2}}} {(y^{3} + 1)}^{\frac{1}{2}} = 3 x^{0.5} {(y^{3} + 1)}^{\frac{1}{2}}$

Step 6.3.1.2

Rewrite the expression.

$9 y^{2} y' = 3 x^{0.5} {(y^{3} + 1)}^{\frac{1}{2}}$

Step 6.4

Divide each term in $9 y^{2} y' = 3 x^{0.5} {(y^{3} + 1)}^{\frac{1}{2}}$ by $9 y^{2}$ and simplify.

Tap for more steps...

Step 6.4.1

Divide each term in $9 y^{2} y' = 3 x^{0.5} {(y^{3} + 1)}^{\frac{1}{2}}$ by $9 y^{2}$ .

$\frac{9 y^{2} y'}{9 y^{2}} = \frac{3 x^{0.5} {(y^{3} + 1)}^{\frac{1}{2}}}{9 y^{2}}$

Step 6.4.2

Simplify the left side.

Tap for more steps...

Step 6.4.2.1

Cancel the common factor of $9$ .

Tap for more steps...

Step 6.4.2.1.1

Cancel the common factor.

$\frac{9 y^{2} y'}{9 y^{2}} = \frac{3 x^{0.5} {(y^{3} + 1)}^{\frac{1}{2}}}{9 y^{2}}$

Step 6.4.2.1.2

Rewrite the expression.

$\frac{y^{2} y'}{y^{2}} = \frac{3 x^{0.5} {(y^{3} + 1)}^{\frac{1}{2}}}{9 y^{2}}$

Step 6.4.2.2

Cancel the common factor of $y^{2}$ .

Tap for more steps...

Step 6.4.2.2.1

Cancel the common factor.

$\frac{y^{2} y'}{y^{2}} = \frac{3 x^{0.5} {(y^{3} + 1)}^{\frac{1}{2}}}{9 y^{2}}$

Step 6.4.2.2.2

Divide $y'$ by $1$ .

$y' = \frac{3 x^{0.5} {(y^{3} + 1)}^{\frac{1}{2}}}{9 y^{2}}$

Step 6.4.3

Simplify the right side.

Tap for more steps...

Step 6.4.3.1

Factor $3$ out of $3 x^{0.5} {(y^{3} + 1)}^{\frac{1}{2}}$ .

$y' = \frac{3 (x^{0.5} {(y^{3} + 1)}^{\frac{1}{2}})}{9 y^{2}}$

Step 6.4.3.2

Cancel the common factors.

Tap for more steps...

Step 6.4.3.2.1

Factor $3$ out of $9 y^{2}$ .

$y' = \frac{3 (x^{0.5} {(y^{3} + 1)}^{\frac{1}{2}})}{3 (3 y^{2})}$

Step 6.4.3.2.2

Cancel the common factor.

$y' = \frac{3 (x^{0.5} {(y^{3} + 1)}^{\frac{1}{2}})}{3 (3 y^{2})}$

Step 6.4.3.2.3

Rewrite the expression.

$y' = \frac{x^{0.5} {(y^{3} + 1)}^{\frac{1}{2}}}{3 y^{2}}$

Step 7

Replace $y'$ with $\frac{d y}{d x}$ .

$\frac{d y}{d x} = \frac{x^{0.5} {(y^{3} + 1)}^{\frac{1}{2}}}{3 y^{2}}$