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Precalculus Examples
Step 1
Step 1.1
To find the x-intercept(s), substitute in for and solve for .
Step 1.2
Solve the equation.
Step 1.2.1
Rewrite the equation as .
Step 1.2.2
Rewrite in exponential form using the definition of a logarithm. If and are positive real numbers and , then is equivalent to .
Step 1.2.3
Solve for .
Step 1.2.3.1
Rewrite the equation as .
Step 1.2.3.2
Anything raised to is .
Step 1.3
x-intercept(s) in point form.
x-intercept(s):
x-intercept(s):
Step 2
Step 2.1
To find the y-intercept(s), substitute in for and solve for .
Step 2.2
Solve the equation.
Step 2.2.1
The logarithm of zero is undefined.
Step 2.2.2
Remove parentheses.
Step 2.2.3
The equation cannot be solved because it is undefined.
Step 2.3
To find the y-intercept(s), substitute in for and solve for .
y-intercept(s):
y-intercept(s):
Step 3
List the intersections.
x-intercept(s):
y-intercept(s):
Step 4