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    Term independent of x in binomial expansion, (but k is non-integer in expansion?)

    Hi I need help with a question as I am getting k as a non-integer when doing the binomial expansion. Question: Find the term independent of x in the expansion of: (\frac{2}{x^4} + x^2)^{14} My attempt: (\frac{2}{x^4} + x^2)^{14} = \binom{14}{k}(2x^{-4})^{14-k}(x^2)^k =...
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