Question

F(x) = x^5 - 2x^3 + 12; find f(3) and f(-2)

Answer 1

f(3)=201

f(2)=-4

Explanation:

Plug in each value for x

`3^(5) -2(3)^(3) +12`

`243-54+12=201`

`-2^(5) -2(-2)^(3) +12`

`-32+16+12=-4`

Answer 2

f(3) = 201

f(-2) = -4

Explanation:

`f(x) = x^5 - 2x^3 + 12`

`f(3) = (3)^5 - 2(3)^3 + 12`

`\implies f(3) = 243 - 54 + 12`

`\implies f(3) = 201`

`f(-2) = (-2)^5 - 2(-2)^3 + 12`

`\implies f(-2) = -32+16 + 12`

`\implies f(-2) = -4`