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Q.

Given that n AM’s are inserted between two sets of numbers a, 2b and 2a, b where a,b∈R suppose further that the nth mean between these sets of numbers is same then the ratio a:b=

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a

1:n

b

n:1

c

n+1:1

d

n+2:n-1

answer is B.

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Detailed Solution

1+2b−an+1n=2a+b−2an+1n⇒a=nb

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