Question

14. Wy is mean proportional between x and z, prove that
wy: (x + y + xy + y2 + zx).​

Answer 1

Answer:

Mean proportional means :   x/y = y/z     =>   y² = zx

LHS = y y² (x+y +z)³ 

RHS = (xy + yz + y²)³ = y³ (x+z+y)³

so proved.

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Answer 2

Answer:

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