Q) Solve :-   \frac{2}{\sqrt X} + \frac{3}{\sqrt Y} = 2; \frac{4}{\sqrt X} - \frac{9}{\sqrt Y} = – 1, x, y > o

Ans: Let’s consider, \frac{1}{\sqrt X}  = A and \frac{1}{\sqrt Y} = B

therefore the given equations will be:

Equation \frac{2}{\sqrt X} + \frac{3}{\sqrt Y} = 2 will become:

2 A + 3 B = 2 ………. (i)

Similarly, \frac{4}{\sqrt X} - \frac{9}{\sqrt Y} = – 1 will become:

4 A – 9 B = -1 ….. (ii)

By solving equations (i) and (ii), we get:

A = 1/2 and B = 1 /3

Next, let’s put these values back into original form of A and B, Hence,

A = \frac{1}{\sqrt X} = \frac{1}{2}

By squaring on both sides, we get:

\frac{1}{X} = \frac{1}{4}

X = 4

Similarly, B = \frac{1}{\sqrt Y} = \frac{1}{3}

By squaring on both sides, we get:

\frac{1}{Y} = \frac{1}{9}

Y = 9

Since both values satisfies the given condition of X, Y > 0.

Therefore value of X is 4 and value of Y is 9.

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