Sustainable growth rate of output derivation for neoclassical theory?

CFA Level II
#1

For CFA level 2, it says g = theta/(1-alpha), but i cannot find the derivations for it…

How do we derive it? starting from Y= T (K)alpha(L)(1-alpha)?

#2

Take a look at §5.2.1 in “Economic Growth and the Investment Decision”; they derive it there.