Help me: (4b)^3 : b^9 * b^5 при b = 128

Question

Help me:
(4b)^3 : b^9 * b^5 при b = 128

Answer 1

(4b)³:b⁹*b⁵ = 4b⁻¹ = 4:b
Если b = 128, то 4:128 = 1:32 = 0,03125