Question

решите срочно 4 и 5 по возможности 6

Answer 1

4.
27²/³+(1/16)⁻⁰`⁷⁵-25⁰`⁵=9+8-5=12  (C)
5.
(2¹/₂)²=(5/2)²=25/4=6¹/₄    (D)
6.
(7a⁵)⁸/(-49a⁵)⁴=(7⁸*a⁴⁰)/(-7²*a⁵)⁴=(7⁸*a⁴⁰)/(7⁸*a²⁰)=a²⁰.