Question

f:R->R

f(x)= -2x+1/2

Calculati a=f(1)+f(2)+f(3)+...........+f(50)

Answer 1

Răspuns:

Explicație pas cu pas:

f(1)+f(2)+.......+f(50)=-2(1+2+3........+50)+50×1/2

-2×50×51/2+50/2=50(-102+1)/2=50(-101)/2=-5050/2=2525