solve this question guy's
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25^n-1=5^2n-1
by subtracting 5^2n-1 and 5^2n-1=0
answer =100
=10^2
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25(n-1)-5(2n-1)+
=25n-25-10n+5+=0
=15n-20+=0
=15n+80=0
=15n=-80
= n=-80/15=. -16/3
sanketksarda:
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