Violet Evergarden

Tìm số tự nhiên x biết :

a ) (3x - 2 mũ 4) . 7 mũ 3 = 2 . 7 mũ 4

b) 3 . 2 mũ x + 2 mũ x + 3 = 88

c) 3 mũ x + 3 - 3 mũ x = 234

d ) 2 mũ x + 2 mũ x + 1 + 2 mũ x + 2 + 2 mũ x + 3 - 480 = 0

e ) 15 < 2 mũ x < 67

Ối giời ối giời ôi
14 tháng 10 2018 lúc 15:10

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