the value of 49(1-log72) +5-log54is
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ANSWER
49
A
=49
1−log
7
2
=
49
log
7
2
49
=
7
log
7
4
49
=
4
49
[∵a
log
a
b
=b]
5
B
=5
−log
5
4
[∵mloga=loga
m
]=5
log
5
4
1
=
4
1
∴49
A
+5
B
=
2
25
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