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Question

If x/y =1/3, then value of

(x^{2} + y^{2}) / (x^{2} - y^{2})

is-

-10/9

5/4

-5/4

-5/3

ANSWER : 3

Descrption

<p>&nbsp; &nbsp; &nbsp;<math xmlns="http://www.w3.org/1998/Math/MathML"><mfrac><mi>x</mi><mi>y</mi></mfrac><mo>&nbsp;</mo><mo>=</mo><mo>&nbsp;</mo><mfrac><mn>1</mn><mn>3</mn></mfrac><mspace linebreak="newline">&nbsp;</mspace><mfrac><msup><mi>x</mi><mn>2</mn></msup><msup><mi>y</mi><mn>2</mn></msup></mfrac><mo>&nbsp;</mo><mo>=</mo><mo>&nbsp;</mo><mfrac><mn>1</mn><mn>9</mn></mfrac><mspace linebreak="newline">&nbsp;</mspace><mfrac><mrow><msup><mi>x</mi><mn>2</mn></msup><mo>+</mo><msup><mi>y</mi><mn>2</mn></msup></mrow><mrow><msup><mi>x</mi><mn>2</mn></msup><mo>-</mo><msup><mi>y</mi><mn>2</mn></msup></mrow></mfrac><mo>&nbsp;</mo><mo>=</mo><mo>&nbsp;</mo><mfrac><mrow><mn>1</mn><mo>+</mo><mn>9</mn></mrow><mrow><mn>1</mn><mo>-</mo><mn>9</mn></mrow></mfrac><mspace linebreak="newline">&nbsp;</mspace><mo>&nbsp;</mo><mo>&nbsp;</mo><mo>&nbsp;</mo><mo>&nbsp;</mo><mo>&nbsp;</mo><mo>&nbsp;</mo><mo>&nbsp;</mo><mo>&nbsp;</mo><mo>&nbsp;</mo><mo>&nbsp;</mo><mo>&nbsp;</mo><mo>&nbsp;</mo><mo>&nbsp;</mo><mo>&nbsp;</mo><mo>&nbsp;</mo><mo>&nbsp;</mo><mo>=</mo><mo>&nbsp;</mo><mfrac><mn>10</mn><mrow><mo>-</mo><mn>8</mn></mrow></mfrac><mo>&nbsp;</mo><mo>=</mo><mo>&nbsp;</mo><mo mathvariant="bold">-</mo><mfrac><mn mathvariant="bold">5</mn><mrow><mn mathvariant="bold">4</mn><mo mathvariant="bold">&nbsp;</mo></mrow></mfrac><mo mathvariant="bold">&nbsp;</mo><mo mathvariant="bold">(</mo><mi mathvariant="bold-italic">A</mi><mi mathvariant="bold-italic">n</mi><mi mathvariant="bold-italic">s</mi><mo mathvariant="bold">)</mo></math></p>

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