Question

Cari nilai x
A) 4^x-2 = akar 2^x-5
B) 3^x-2 = (1/3)^x+2

Answer 1

A) 4^x-2 = akar 2^x-5
2^2x-4 = 2^(x-5) / 2
2x-4 = (x-5) / 2
4x-8 = x-5
4x-x = -5+8
3x = 3
x = 1

b) 3^x-2 = (1/3)^x+2
3^x-2 = 3^-x-2
x-2 = -x-2
x+x = -2+2
2x = 0
x = 0

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