Find: The middle term of $\left(x+\frac1x\right)^8$. The two middle terms of $(1+2x)^7$, in asce

Question

Find: The middle term of $\left(x+\frac1x\right)^8$. The two middle terms of $(1+2x)^7$, in ascending powers of $x$.

Accepted Answer

(a) $70$; (b) $280x^3$ and $560x^4$.

Binomial Theorem