Question

f R-R f(x)=x+1
calculați f(0)+f(1)+f(2)+...+f(10)​

Answer 1

f(0) = 0+1 = 1

f(1) = 1+1 = 2

f(2) = 2+1 = 3

..........................

f(10) = 10+1 = 11

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f(0)+f(1)+f(2)+...+f(10) = 1+2+...+11 = [11(11+1)]/2 = (11*12)/2 = 11*6 = 66