Kunci Jawaban Matematika Kelas 9 Halaman 20, Perkalian pada Perpangkatan

d. 128/3 = 1/3 x 27

Soal nomor 7

a. (3^x)^x = 81

= 3^x.x = 3⁴
→ x² = 4 → x = 2

b. 1/64 x 4^x x 2^x = 64

= (2²)^x x 2^x = 64 x 64
→ 2^2x x 2^x = 2⁶ x 2⁶
→ 2^3x = 2¹²
→ 3x = 12 → x = 4

Soal nomor 8

4³ x 5⁶, Rumus = (aⁿ.bⁿ = (ab)ⁿ

=(2²)³ x 5⁶
= 2⁶ x 5⁶
= 10⁶

Soal nomor 9