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The value of the term independent of $x$ in the expansion of $(1-x)^2(x+\frac{1}{x})^7$ is

  1. $-70$
  2. $70$
  3. $35$
  4. None of these
in Combinatory by Boss (16.8k points)
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$(x+a)^{n}$=$\sum \binom{n}{r} x^{n-r} a^{r}$ put x power zero find r then put r in equations

Ans=-70
by Junior (761 points)
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