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If a, b, c are in A.P. and x, y, z are in G.P., then prove that :
`x^(b-c).y^(c-a).z^(a-b)=1`

A

-1

B

0

C

1

D

none of these

Text Solution

Verified by Experts

The correct Answer is:
C
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  12. If sum(r=1)^(n) r=210, then : sum(r=1)^(n) r^(2)=

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