Question

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giup em voi em hoc toan nang cao lop 5 ma lai co bai lop 6 la :   x . 2^32 = 8^11 ; 2^x+1 : 8 = 32^5

Answer 1

[soyeon_Tiểu bàng giải]

x.2³² = 8¹¹

x.2³² = (2³)¹¹

x.2³² = 2³³

x = 2³³:2³²

x = 2

2^x+1:8 = 32⁵

2^x+1 = 32⁵.8

2^x+1 = (2⁵)⁵.2³

2^x+1 = 2²⁵.2³

2^x+1 = 2²⁸

=> x + 1 = 28

=> x = 28 - 1 = 27

Answer 2

[nguyen thi lan huong]

x.2³² = 8¹¹

x .2³² =(2³ )¹¹

x.2³² = 2³³

x = 2³³ : 2³²

x = 2

2^x+1:8=32⁵

2^x+1=32⁵ x 8

2^x+1= ( 2⁵ )⁵ x 2³

2^x+1 = 2²⁵ x 2³

2^x+1 = 2²⁸

x + 1 = 28

x = 28 - 1

x = 27