Find all values of : $(2)^{i+1}=?$ 
Find all values of :
$$(2)^{i+1}=?$$

My Try :
$$i+1=\large\sqrt2e^{\frac{i\pi}4}$$
$$(2)^{\large\sqrt2e^{\frac{i\pi}4}}=?$$
now what ?

$$ 2^{i+1} = e^{ (i + 1) \ln 2} = e^{\ln 2} e^{i\ln 2} = 2(\cos (\ln 2) + i\sin (\ln 2)) $$
