JEE MATHEMATICS MCQ: SEQUENCE OF SERIES

1 Hard

1 of 1

Application +4 | -1

The coefficient of

{x^n}

in the expansion of

\frac{{{e^{7\;x}} + {e^x}}}{{{e^{3\;x}}}},

View answer and explanation

Correct option: D

None of these

Option D (None of these) is correct because the coefficient of x^n in the expansion is

\frac{{{{4^n}} + {{\left( { - 2} \right)}^n}}}{{n\\;!}}

, which doesn't match any of the given options.

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