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WBJEE 2020 Math Solved Paper
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© examsnet.com
Question : 13
Total: 75
If a and b are arbitrary positive real numbers, then the least possible value of
6
a
5
b
+
10
b
3
a
is
4
6
5
10
3
68
15
Validate
Solution:
6
a
5
b
+
10
b
3
a
≥
2
√
6
a
5
b
×
10
b
3
a
,
6
a
5
b
+
10
b
3
a
≥
2
×
2
≥
4
© examsnet.com
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