Need help with this programme( sum of series )

Question

Find the sum of the series:-

x^2+ x^4/3!+ x^6/5!+..... x^2n/ (2n-1)!

I used a nested for loop for this. First i declared f= 1 for the factorial and then i declared sum=0. My for statements were like this.

for i in range(1,n+1):
for j in range(1,2*i):
f*=j
sum+=x**2*i/f

But I'm getting the wrong output every time.
What correction should I make in my code?

Please reply ASAP

Answer 1

I guess you have to reset f after your iterarion? :) After adding your element to the sum you should write f=1

Answer 2

All right. Thank you!

Answer 3

Use recursion and for reducing time complexity you can also use Horner's rule

Answer 4

I don't know what that is. I'm a beginner in Python. Can you please explain?

Answer 5

when a function calls itself then it's recursion. And you must learn it because you can solve any complex problem very easily