what is the answer

Question

if f(x)=1-x²+x³, then f(-1)=

Answer 1

Hello, Brandon.

The function f(x)=1 - x² + x³ means that whatever you chose for x, the result would be as the equation states. If x=0, the result would be 1. If x is 1, the result would be 1 - 1² + 1³ = 3. The statement f(-1) means the same function, but with x = -1:

f(-1) = 1 - (-1)² + (-1)³

f(-1) = 1 - (1) + (-1)

f(-1) = -1 (! - a lot of work just to wind up where we started)

Bob

Answer 2

f(-1) is the value of f(x) when x = -1. So just plug -1 in place of x in the equation and compute the answer.