If the coefficients of X7 and X6 in 2-x-3n are equal- then n isA- 56B- 55C- 45D- 15

The correct option is B 55 Here ^nC_72^n 7/3^7=^nC_82^n 8/3^8⇒ n=55 ...

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Implicit Differentiation

If the coeffi...

Question

If the coefficients of $X^{7}$ and $X^{6}$ in ${(2 + \frac{x}{3})}^{n}$ are equal, then n is

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{(2 + \frac{x}{3})}^{n}

x^{7}

x^{8}

{(2 + \frac{x}{3})}^{n}

n

x^{7}

x^{8}

{(2 + \frac{x}{3})}^{n}

n =

x^{7}

x^{8}

{(2 + \frac{x}{3})}^{n}

=

If the coefficient of $x^{7}$ and $x^{8}$ in ${(2 + \frac{x}{3})}^{n}$ are equal, then n is:

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