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Which of the following polynomials is the expansion of \((a+b)^3\)?निम्नलिखित में से कौन-सा बहुपद
\((a+b)^3\) का प्रसार है?
Answer and explanationउत्तर और व्याख्या
Correct answer:सही उत्तर: \(a^3+3a^2b+3ab^2+b^3\)\(a^3+3a^2b+3ab^2+b^3\)
The cube identity is \((a+b)^3=a^3+3a^2b+3ab^2+b^3\), so A is correct. In B, the sign of the last term is wrong. Exam tip: remember the coefficient pattern 1, 3, 3, 1.घन द्विपद पहचान है \((a+b)^3=a^3+3a^2b+3ab^2+b^3\), इसलिए A सही है। B में अंतिम पद का चिन्ह गलत है। परीक्षा में गुणांकों का क्रम 1, 3, 3, 1 याद रखें।
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