Question

f:R-R
f(x)=x^2 + 1
Calculati S= f(1)+ f(2)+...+f(100)

Answer 1

S=1²+1+2²+1+3²+1+4²+1+...+100²+1=1²+2²+3²+4²+...+100²+100=
n(n+1)(2n+1)/6+100=100*101*201/6+100=338450