Question

dada a funçao expoencial f(x)=4ˣ-²,determine f(4)-f(3)

Answer 1

f(x) = 4 ˣ ⁻ ²

f(4) = 4 ⁴ ⁻ ²

f(4) = 4 ²

f(4) = 16

f(3) = 4 ³ ⁻ ²

f(3) = 4 ¹

f(3) = 4

f(4) - f(3) = 16 - 4

f(4) - f(3) = 12

Answer 2

Oi...

$f(x) = 4^x^-^2\\\\f(4)=4^4^-^2\\\\f(4)=4^2\\\\f(4) =16\\\\\\f(3)=4^3^-^2\\\\f(3)=4^1\\\\f(3)=4\\\\f(4)-f(3)=16-4\\\\f(4)-f(3)=12$

Bons estudos.