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4.
(A) T
If 16x² +9y² + 42² = 24(x-y+z)-61, then the
value of (xy + 2z) is:
f 16x² +9y² + 4z² = 24(x − y + z) -61%, (xy
+ 22) का मान होगा :
(A) 1
(B) 2
(C) 3
(D) 7
114, then the

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