Math, asked by Khushi5886, 1 year ago

5^x+1+5^x-2=126,find x

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Answered by REDRAGON

1

REDUCTION
$5 {}^{x + 1} + 5 {}^{x - 2} = 126 \\ 5 {}^{x} (5 + \frac{1}{25} ) = 126 \\ 5 {}^{x} = 25 \\ x = 2$

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