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a = b হলে, $a^{3} - 7 a^{2} b + 7 {ab}^{2} - b^{3}$ = কত?

ANSWER : 2

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<a href="https://www.sattacademy.com/job-solution/single-question?ques_id=238703">&nbsp;</a><math xmlns="http://www.w3.org/1998/Math/MathML"><msup><mi mathvariant="normal">a</mi><mn>3</mn></msup><mo>-</mo><mn>7</mn><msup><mi mathvariant="normal">a</mi><mn>2</mn></msup><mi mathvariant="normal">b</mi><mo>+</mo><mn>7</mn><msup><mi mathvariant="normal">ab</mi><mn>2</mn></msup><mo>-</mo><msup><mi mathvariant="normal">b</mi><mn>3</mn></msup></math>&nbsp;<math xmlns="http://www.w3.org/1998/Math/MathML"><mo>=</mo><mo>&nbsp;</mo><msup><mi mathvariant="normal">b</mi><mn>3</mn></msup><mo>-</mo><mn>7</mn><mo>.</mo><msup><mi mathvariant="normal">b</mi><mn>2</mn></msup><mo>.</mo><mi mathvariant="normal">b</mi><mo>+</mo><mn>7</mn><mo>.</mo><mi>b</mi><mo>.</mo><msup><mi>b</mi><mn>2</mn></msup><mo>-</mo><msup><mi mathvariant="normal">b</mi><mn>3</mn></msup></math><math xmlns="http://www.w3.org/1998/Math/MathML"><mo>=</mo><mo>&nbsp;</mo><msup><mi mathvariant="normal">b</mi><mn>3</mn></msup><mo>-</mo><mn>7</mn><msup><mi mathvariant="normal">b</mi><mn>3</mn></msup><mo>-</mo><mn>7</mn><msup><mi>b</mi><mn>3</mn></msup><mo>-</mo><msup><mi mathvariant="normal">b</mi><mn>3</mn></msup></math><math xmlns="http://www.w3.org/1998/Math/MathML"><mo>=</mo><mo>&nbsp;</mo><mn>0</mn></math>Answer : 0

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