Questions
If be two arithmetic means and be two geometric means between two positive numbers a and b, then is equal to
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a
aba+b
b
2aba+b
c
a+b2ab
d
a+bab
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Correct option is D
Use A1+A2=a+b and G1G2=ab.Similar Questions
Geometric mean of 10 observations is 8. If geometric mean of first six observations is 4, then geometric mean of last four observations is
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