यदि 16x^(2) + 9y^(2) + 4z^(2) = 24 (x-y+...

यदि `16x^(2) + 9y^(2) + 4z^(2) = 24 (x-y+z) - 61` है, तो `(xy + 2z)` का मान होगा-

A

5

B

2

C

3

D

1

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The correct Answer is:

A

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