JEE Main & Advanced
Mathematics
Functions
Question Bank
Numerical Value Type Questions - Function
question_answer
If \[f\left( x \right)\] is a function satisfying \[f\left( x+y \right)=f\left( x \right)\,\,f\left( y \right)\] for all \[x,\,\,y\,\,\in \,\,N\] such that \[f\left( 1 \right)=3\] and \[\sum\limits_{x=1}^{n}{f\left( x \right)}=120,\] then find the value of n.