Question

Dada a função exponencial f(x) = 3 elevado 4x - 6 , calcule :

a) f(2)

b)f(3)

Answer 1

$f(x)=3^{4x-6}\\ \\ f(2)=3^{4.2-4}=3^{4}=81\\ \\ f(3)=3^{4.3-4}=3^8=6561$

Answer 2

f(x) = 3 ⁴ˣ ⁻ ⁶

a)  f(x) = 3 ⁴ˣ ⁻ ⁶   ----- f(2) ----- 4 . 2 - 6 ----- 8 - 2 = 2

f(2) = 3² ---- f(2) = 9


f(3) = 3 ⁴ˣ ⁻ ⁶  ------ 4 . 3 - 6 ---- 12 - 6 ----- 6


f(3) = 3⁶ ------ f(3) = 729