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Question

$a^{- n} = \frac{1}{a^{n}}$ কোন শর্তে সত্য?

a=0

a≠0

a>0

a<0

ANSWER : 2

Descrption

<p><math xmlns="http://www.w3.org/1998/Math/MathML"><mrow><msup><mi>a</mi><mn>0</mn></msup><mo>=</mo><mn>1</mn><mo>,</mo></mrow></math>&nbsp;<math xmlns="http://www.w3.org/1998/Math/MathML"><mrow><mi>a</mi><mo>≠</mo><mn>0</mn></mrow></math></p><p><math xmlns="http://www.w3.org/1998/Math/MathML"><mrow><msup><mi>a</mi><mrow><mo>-</mo><mi>n</mi></mrow></msup><mo>=</mo><mfrac><mn>1</mn><msup><mi>a</mi><mi>n</mi></msup></mfrac></mrow></math>&nbsp;,<math xmlns="http://www.w3.org/1998/Math/MathML"><mrow><mi>a</mi><mo>≠</mo><mn>0</mn></mrow></math></p><p><math xmlns="http://www.w3.org/1998/Math/MathML"><mrow><msup><mi>a</mi><mi>x</mi></msup><mo>=</mo><msup><mi>a</mi><mi>y</mi></msup></mrow></math>&nbsp;হলে&nbsp;<math xmlns="http://www.w3.org/1998/Math/MathML"><mrow><mi>x</mi><mo>=</mo><mi>y</mi></mrow></math>&nbsp;যখন&nbsp;<math xmlns="http://www.w3.org/1998/Math/MathML"><mrow><mi>a</mi><mo>&gt;</mo><mn>0</mn></mrow></math>&nbsp;এবং&nbsp;<math xmlns="http://www.w3.org/1998/Math/MathML"><mrow><mi>a</mi><mo>≠</mo><mn>0</mn></mrow></math></p><p><math xmlns="http://www.w3.org/1998/Math/MathML"><mrow><msup><mi>a</mi><mi>x</mi></msup><mo>=</mo><msup><mi>b</mi><mi>x</mi></msup></mrow></math>&nbsp;হলে a= b যখন&nbsp;<math xmlns="http://www.w3.org/1998/Math/MathML"><mrow><mi>a</mi><mo>&gt;</mo><mn>0</mn><mo>,</mo><mi>b</mi><mo>&gt;</mo><mn>0</mn></mrow></math>&nbsp;,&nbsp;<math xmlns="http://www.w3.org/1998/Math/MathML"><mrow><mi>x</mi><mo>≠</mo><mn>0</mn></mrow></math></p>

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