i have tried to apply what the both of you said but it is not working for me. Here is what i did. Please let me know what i did wrong.
function [y]= fifthroot (P)
x=p
xi=1
i=5
endcondition=0.00001;
xi=xi-((xi^5-P)/(5*xi)^4);
E=abs((xi-x)/x);
if E<0.00001
break
while E > endcondition...