Ap EapcetFunctionsAP EAPCET 2024 - 20th May Evening ShiftMCQ+1 / -02024$f: R \rightarrow R$ is defined by $f(x+y)=f(x)+12 y, \forall x, y \in R$. If $f(1)=6$, then $\sum_{r=1}^n f(r)=$A$n^2$B$5 n^2$C$6 n^2$D$\frac{3 n(n+1)}{2}$Check AnswerClear SelectionReveal AnswerShow Explanation
