mtk kelas 9 materi perpangkatan no 17 sampai 21

16) 6^x+2 = (36)^x+2
6^x+2 = (6²)^x+2
=> x + 2 = 2(x + 2)
=> x + 2 = 2x + 4
=> x - 2x = 4 - 2
=> - x = 2
=> x = - 2

17) 4^x+3 = ⁴√(16)^x+5
(2²)^x+3 = ⁴√(2⁴)^x+5
=> 2(x + 3) = { 4 ( x + 5)} / 4
=> 2x + 6 = x + 5
=> 2x - x = 5 - 6
=> x = - 1

18) 6^x+2 = (36)^x+2
6^x+2 = (6²)^x+2
=> x + 2 = 2 ( x + 2)
=> x + 2 = 2x + 4
=> x - 2x = 4 - 2
=> - x = 2
=> x = - 2