Plz give correct answer
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Answer:
(b)
Step-by-step explanation:
5^x=7^(x+1)
5^x=7×7^x
5^x/7^x=7
(5/7)^x=7
x log (5/7)=log 7
x= log 7/log (5/7)
=log 7/(log 5 - log 7)
= 1/(log 5/log 7 - log 7/log 7)
=1/(log7 5 -1). 7 is the base
ans is (b)
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