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If in the expansion of (1+x)^n the coeff...

If in the expansion of `(1+x)^n` the coefficient of three consecutive terms are 56,70 and 56, then find `n` and the position of the terms of these coefficients.

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The correct Answer is:
n = 8, `4^(th)`, `5^(th)` and `6^(th)`
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CBSE COMPLEMENTARY MATERIAL-BINOMIAL THEOREM -SHORT ANSWER TYPE QUESTIONS (section-C)
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  12. If in the expansion of (1+x)^n the coefficient of three consecutive te...

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  13. Show that 2^(4n+4)-15n-16, where n in N is divisible by 225.

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  14. If the coefficients of three consecutive terms in the expansion of (1 ...

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  15. Show that the coefficient of middle term in the expansion of (1 + x)^(...

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