Without using tables find the numerical value of log_{7}49 + log7_{((frac{1}{7}))}

A.
1 
B.
2 
C.
3 
D.
7 
E.
9
Correct Answer: Option A
Explanation
log_{7}49 + log7_{(frac{1}{7})}
= log_{7}7
= 1
log_{7}49 + log7_{(frac{1}{7})}
= log_{7}7
= 1