(-3)^x=81 nilai x adalah

x = 4

(-3) x (-3) x (-3) x (-3) = 9 x 9 = 81.
(Negatif kali negatif hasilnya positif).


Semoga terbantu

Ingat rumus:
ᵃlogb = x ----->> aˣ = b

Jwb:
-3ˣ = 81
⁻³log81 = x
⁻³log-3⁴ = x
4 = x


Atau


-3^x = 81
-3^x = -3⁴ ------>> (coret "-3")
x = 4