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Find a positive value of m for which the coefficient of x^2 in the expansion (1 + x)^m is 6.

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Find a positive value of m for which the coefficient of x2 in the expansion (1 + x)m is 6.

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Solution:

Thus, the positive value of m , for which the coefficient of x 2 in the expansion 

(1 + x ) m is 6, is 4. 

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