Question

Function: Let f(x)= x^3 +4x^2 +Ax +2 and f(1)=15. Find the value of A.

Answer 1

f(1)=15 means you plug in x = 1 and the output of the function is 15

Answer 2

f(x)= x^3 +4x^2 +Ax +2

f(1)= (1)^3 +4*(1)^2 +A*(1) +2 ... replace every x with 1

15 = (1)^3 +4*(1)^2 +A*(1) +2 ... plug in f(1) = 15

now solve for A

Answer 3

So it going to be 8? @jim_thompson5910

Answer 4

So the value for A is 8 right?

Answer 5

A = 8 is correct