if (3)power x+1 =1/81 find x
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Answered by
1
Hi ,
3^(x+1) = 1/81
3^(x +1) = 1/3⁴
3^(x+1) = 3^-4
[ Since 1/a^n = a^-n ]
x+1 = -4
[ Since If a^m = a^n then m = n ]
x=-5
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Answered by
1
#x=5#
As #3^(x-1)=81#, we have
#x-1=log_(3)81=log_(3)3^4#
= #4log_(3)3=4×1=4#
Hence #x=4+1=5#.
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