tìm X E N ( 3x - 7 ) mũ 5 = 32 ( 4 x - 1 ) mũ 3 = 27 x 125 2 mũ 2 x -1 = 32 2 mũ x + 2 mũ x + 1 = 96 100 < 5 mũ 2 x - 3 < 59

Đáp ánGiải thích các bước giải:

`(3x-7)^5 = 32`

`=> (3x-7)^5 = 2^5`

`=> 3x-7=2`

`=>3x = 9`

`=>x = 3`

Vậy `x= 3`

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`(4x-1)^3 = 27 . 125`

`=> (4x-1)^3 = 3^3 . 5^3`

`=> (4x-1)^3 = (3.5)^3`

`=> (4x-1)^3 = 15^3`

`=> 4x-1=15`

`=> 4x=16``

`=>x=4`

Vậy `x=4`

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`2^(2x- 1) = 32`

`=> 2^(2x-1) = 2^5`

`=> 2x-1=5`

`=> 2x=6`

`=>x=3`

Vậy `x=3`

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`2^x + 2^(x+1) = 96`

`=> 2^x + 2^x . 2 = 96`

`=> 2^x . (1+2) = 96`

`=> 2^x = 96 : 3`

`=>2^x = 32`

`=>2^x = 2^5`

`=>x=5`

Vậy `x=5`