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OpenStudy (anonymous):
Find x 7^5x+7 = 2
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OpenStudy (anonymous):
\(7^5(x)+7=2\) ?
OpenStudy (anonymous):
7^(5x+7) = 2
OpenStudy (anonymous):
@hartnn
hartnn (hartnn):
does this question belong to topic logarithms ?
OpenStudy (anonymous):
yes
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hartnn (hartnn):
so take log on both sides, what u get ?
OpenStudy (anonymous):
log7^5x+7 = log 2
hartnn (hartnn):
u know, log x^n = n log x ?
OpenStudy (anonymous):
(5x+7)log7 = log 2
hartnn (hartnn):
now try to isolate x
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hartnn (hartnn):
u get x= (log 2/ log 7 -7 )/5
hartnn (hartnn):
or x= (log[7] 2-7)/5
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