Question

Tentukan himpunan dari ^2log x + ^2log (x+2) = 3

Answer 1

Verified answer

2'log x + 2'log (x + 2) = 3
2'log x(x + 2) = 2'log 2^3
x(x + 2) = 2^3
x² + 2x = 8
x² + 2x - 8 = 0
(x + 4)(x - 2) = 0
x = -4 (tdk memenuhi)
x = 2

Nilai x yg memenuhi :
x = 2