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Question

If A1,A2 be two arithmetic means and G1,G2 be two geometric means between two numbers a and b , then A1+A2G1G2 is equal to:

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Solution

# A1 and A2 are arithmetic means
between a and b,
So, A1+A2=a+b
[sum of r term from
beginning & (n-r) th term
from end is equal
to a+b]
# G1 and G2 are geometric means
between a and b
So, G1.G2=ab
[Product of rth term
from beginning and
(nr)th term from end
is equal to ab]
Now, A1+A2G1×G2=a+bab

1116929_1201975_ans_5291da324c6142ea9fb9f1f9cbc26e91.jpg

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