Is there formula for getting f(k) if I know F(n) in this equation:
sum_(k=1, to n) f(k) = F(n)
for example:
sum_(k=1, to n) f(k) = n^3
f(k)=?
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Is there formula for getting f(k) if I know F(n) in this equation:
sum_(k=1, to n) f(k) = F(n)
for example:
sum_(k=1, to n) f(k) = n^3
f(k)=?
What is?