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TheCrazyPlayer
a fost răspuns

f:R->R, f(x)=1/2 * x -2/3
s=f(0)+f(1)+f(2)+....f(1000)=?

Răspuns :

Alexandrukerestely

Răspuns:

f(0)=1/2*0-2/3

f(1)=1/2*1-2/3

f(2)=1/2*2-2/3

...

f(1000)=1/2*1000-2/3

Daca le adunam, ne da chiar s

Deci s=1/2*(0+1+2+...+1000)-2/3*1001

s=1/2*(1000*999)/2-2002/3

s=250*999-2002/3

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