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Find the sum of the coefficients of x5 and x7 in the expansion of the product (1+2x)6(1−x)7. Or Show that the middle term in the expansion of (1+2x)2n is 1.3.5...(2n−1)n!2n.xn. |
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Answer» Find the sum of the coefficients of x5 and x7 in the expansion of the product (1+2x)6(1−x)7. Or Show that the middle term in the expansion of (1+2x)2n is 1.3.5...(2n−1)n!2n.xn. |
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