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Suppose a, b, c are positive and form an increasing G.P. If a + b + c = xb, then

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a
x>3
b
x>4
c
x>5
d
x>3+5

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detailed solution

Correct option is A

If r > 1 is the common ratio of the G.P., thenbr+b+br=xb⇒x−1=r+1r>2


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