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Problem
Problem
The value of
49
A
+
5
B
49^A + 5^B
4
9
A
+
5
B
, where
A
=
1
−
log
7
2
A = 1 - \log_7 2
A
=
1
−
lo
g
7
2
and
B
=
−
log
5
4
B = -\log_5 4
B
=
−
lo
g
5
4
is a. 10.5 b. 11.5 c. 12.5 d. 13.5
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