Questions asked by Hitlist321

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• Find the coefficient of x in the expansion of (2x-1/x)^5. I used nCr (a)^n-r (b)^r.but I'm not getting coefficient in terms of x??
  
• Find the coefficient of #x# in the expansion of #(1+x^2)(x/2-4/x)^6#. Can Anyone pls solve step by step with binomial formula?