Write the general term for the binomial expansion of (a + (x)/(2))ⁿ.

The general term $T_{r+1}$ is given by:

$$T_{r+1} = \binom{n}{r} a^{n-r} \left(\frac{x}{2}\right)^r$$ $$T_{r+1} = \binom{n}{r} a^{n-r} \frac{x^r}{2^r}$$

The coefficient of $x^r$ is $\binom{n}{r} a^{n-r} \frac{1}{2^r}$.