Finding the roots of equation by newton-raphson method?
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Write a MATLAB program which utilizes Newton-Raphson method to determine the smallest positive root of the following function:
x^3 – e ^-x = 0.5
i did this but the answer is wrong.. could you please help me about the wrong step?
this is my answer;
x(1)=0;
i=1;
for i=i+1
f(i)=x(i)^3-exp(-x(i))-0.5;
df(i)=3*x(i)^2+exp(-x(i));
x(i+1)=x(i)-(f(i)/df(i));
end
disp(x(end))
4 件のコメント
James Tursa
2022 年 1 月 13 日
x(1)=0 is simply your starting guess which you can choose. From the wording of the assignment you posted it looks like you can pick this yourself.
回答 (1 件)
Ibrahim Mohammed Wajid
2022 年 7 月 5 日
In your code, the for loop is not exactly a loop. It is confined only for one value i = 2.
You can update for i = i + 1 to for i = 1:100 (say) so that your for loop runs for 100 times.
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