Hitunglah: A. 3^-5 x 3^3 : 3^-4 B. (2 x 7)^3 x 7^2 x 1/ 2x7^5 Tolong dibantu ya!!

a. 3^-5×3^3÷3^-4= 3^(-5+3-(-4)) = 3^2 atau 9
b. (2 x 7)^3 x 7^2 x 1/ 2x7^5 = 2^3 × 7^3 × 7^2 ×2^-1 × 7^5 = (7^(3+2+5)) × (2^(3+(-1))) = (7^10)×(2^2)