MCQ
જો $y = {1 \over {a - z}},$ તો ${{dz} \over {dy}} = $
- ✓${(z - a)^2}$
- B$ - {(z - a)^2}$
- C${(z + a)^2}$
- D$ - {(z + a)^2}$
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$x+y+z=2$
$x+2 y+3 z=5$
$x+3 y+\lambda z=\mu$
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