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Am f(x): R->R si f(x) = 1 supra 2 totul ori x minus 2 supra 3. Cu cat e egal f(0) + f(1) + f(2) +...+ f(100) ?

Răspuns :

f(0)=2/3
f(100) = 50+2/3=152/3

Sn=(a1+an)n/2
S100=(2/3+152/3)100/2=154/3*50=7700/3
imi pare ca-i asa )