Question

●If a,b,c are in proportion,then prove that

$(1) \: \frac{11 {a}^{2} + 9ac}{11 {b}^{2} + 9bd } = \frac{ {a}^{2} + 3ac}{ {b}^{2} + 3bd}\\ \\ (2) \: \sqrt{ \frac{ {a}^{2} + {5c}^{2} } { {b}^{2} + {5d}^{2} } } = \frac{a}{b}$
with full explanation please
no spam and copied answers


$\tt\red{Thankyou}$
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Answer 1

Answer:

There was a slight mistake in the question. It should have been a,b,c,d are in proportion. The above is the solution.

Step-by-step explanation:

It takes effort to answer the questions accurately. Hope it helps you. If so, please be grateful and mark it as brainliest please.

Answer 2

Ooh may be u forgot to mention left in your bio .