log105+log10(5x+1)=log10(x+5)+1 হলে x এর মান কত?
Solution
Correct Answer: Option B
log105+log10(5x+1)=log10(x+5)+1
or,log105+log10(5x+1)=log10(x+5) +log1010
or,log105×(5x+1)=log10(x+5)×10
or,log1025x+5=log1010x+50
or,25x+5=10x+50
or,15x=45
∴ x=3
or,log105+log10(5x+1)=log10(x+5) +log1010
or,log105×(5x+1)=log10(x+5)×10
or,log1025x+5=log1010x+50
or,25x+5=10x+50
or,15x=45
∴ x=3
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