If logn2=a and logn5=b, then logn50=
A
a+b
B
a+b2
C
ab2
D
a+2b
Correct Answer: a+2b
logn2= a এবং logn5=b∴ logn50=logn(2×52)=logn2+logn52=logn2 +2logn5=a+2b