Nth triangle((((((((()))))))

i am getting wrong output…please help

hi @abhinavssr2003_eab0717682969e5c,
i can see u solved the question and got 100 points still having doubts?

I hope I’ve cleared your doubt. I ask you to please rate your experience here
Your feedback is very important. It helps us improve our platform and hence provide you
the learning experience you deserve.

On the off chance, you still have some questions or not find the answers satisfactory, you may reopen
the doubt.