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यदि `DeltaABC` में ,`acos^2.(C)/(2)+c cos^2.(A)/(2)=(3b)/(2)` हो , तो भुजाओं a,b व c के मान है -

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यदि `DeltaABC` में ,`acos^2.(C)/(2)+c cos^2.(A)/(2)=(3b)/(2)` हो , तो भुजाओं a,b व c के मान है -
A. समान्तर श्रेणी में है
B. गुणोत्तर श्रेणी में है
C. हरात्मक श्रेणी में है
D. `a+b=3c` को सन्तुष्ट करते है ।
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Correct Answer - A
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