Precalculus Examples

$2 n^{2} - 3$

Step 1

Substitute in the value of $n$ to find the $n$ th term.

$a_{1} = 2 {(1)}^{2} - 3$

Step 2

Simplify each term.

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Step 2.1

One to any power is one.

$a_{1} = 2 \cdot 1 - 3$

Step 2.2

Multiply $2$ by $1$ .

$a_{1} = 2 - 3$

Step 3

Subtract $3$ from $2$ .

$a_{1} = - 1$

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$[\begin{array}{c} x^{2} & \frac{1}{2} \\ \sqrt{π} & \int x d x \end{array}]$