Question 842968
I'm assuming you mean {{{x^2}}}? Use the caret x^2.
{{{f(0)=c(0+4)=4c}}}
{{{f(1)=c(1+4)=5c}}}
{{{f(2)=c(4+4)=8c}}}
{{{f(3)=c(9+4)=13c}}}
The sum of the f values has to equal 1.
{{{4c+5c+8c+13c=1}}}
{{{30c=1}}}
{{{c=1/30}}}