Question

Resolva a equação exponencial: (1/5)^ x²-8= 625

Answer 1

Resposta:

(1/5)^ x²-8= 625

(1/5)^ (x²-8)= 625

(5⁻¹)^ (x²-8)= 5⁴

(5)^ (8-x²)= 5⁴

8 - x² = 4

x²=8-4

x²=4  

x = ±√4

x=±2