Prove that a, b, c and d are in proportion.

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If a + c = mb and \frac { 1 }{ b } +\frac { 1 }{ d } =\frac { m }{ c } , prove that a, b, c and d are in proportion.

Solution:

ML Aggarwal Class 10 Solutions for ICSE Maths Chapter 7 Ratio and Proportion Ex 7.2

If ax = by = cz; prove that
\frac { { x }^{ 2 } }{ yz } +\frac { { y }^{ 2 } }{ zx } +\frac { { z }^{ 2 } }{ xy } = \frac { bc }{ { a }^{ 2 } } +\frac { ca }{ { b }^{ 2 } } +\frac { ab }{ { c }^{ 2 } }

Solution:

ML Aggarwal Class 10 Solutions for ICSE Maths Chapter 7 Ratio and Proportion Ex 7.2

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