First, you must find the slope equation of the tangent line to the function, which is just the derivative of the function:

.

Since that is the slope equation, you need to set that equal to 0 and factor:

, or , which yields .

If the two lines are perpendicular, then their slopes must be opposite reciprocals. Since both lines are tangent to the curve, , their slopes will be equal to the slope of the curve at the points to which they are tangent. So  has slope  and  has slope . Following this, if the lines are perpendicular, then . 

This problem basically amounts to finding the derivative and evaluating it at the given value. We need to use a couple different techniques to find the derivative of this function but they're all fairly simple. We need the chain rule which says:

and the product rule, which is 

So, using these we can calculate our derivative.  and , so:

this equals,

and when we plug in , we get

which can be written as . 

To find the slope, you must find the derivative of the function. Remember, when taking the derivative, multiply the exponent by the coefficient and then subtract 1 from the exponent, this is known as the power rule.

Therefore, the derivative is:

.

Then, to find the slope at 1, just plug 1 into the derivative.

.

The slope (m) between two points is found with the following formula:

We can apply this formula with the points we are given:

This is one of the answer choices.

The slope of a function at a given point is found by first taking the derivative of the function.

Use the power rule to find this derivative, given by:

By evaluating the derivative when  you will find the slope of the function at the point .

To find the value of the slope at , you must first find the derivative of the function since that will give us the slope. To take the derivative of a term, multiplty the exponent by the coefficient in front of the  term, and then subtract  from the exponent. Therefore, the derivative is: . Then, plug in  to get the correct slope value. .

To find the slope, you must first find the derivative. To take the derivative, multiply the exponent by the leading coefficient and then subtract 1 from the exponent. Therefore, the derivative is: . Then, plug in 2 to get the specific value: .

To find the slope, you must first find the derivative function. To take the derivative, multiply the exponent by the leading coefficient and then subtract 1 from the exponent. Therefore, the derivative is: . Then, plug in -1. .

To find the slope, you must first find the derivative of the function. To take the derivative, multiply the exponent by the coefficient in front of the x term and then subtract 1 from the exponent: . Now, plug in 1 for x to get your answer of x=5.