I do not think so, it could be sqrt(sqrt(x)) , or else if it 1/4sqrt(x) , you are supposed to use some iteration formula to calculate an approximate square root of x and then divide it by 4.

APLX is a very complete implementation of the APL programming language from MicroAPL. The company stopped producing it in 2016 and it has been taken over by Dyalog. While Dyalog ...