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Definition of Functions

Solve the fol...

Question

Solve the following equation:
$\sqrt{3 x + 1} + \sqrt{x + 4} = \sqrt{9 - x}$

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Solution

Considering the Domains
$x \leq 9, x \geq - 4, x \leq - \frac{1}{3}$
by Trial and Error method
$⟹ x = 0$

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