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Fie f: R -> R ; F(x) = 3x - 1pe2
Calculati suma = f(1) + f(2) + . . . . . + f(10)


Răspuns :

f(1)=2/2
f(2)=5/2
f(3)=8/2
f(4)=11/2
f(4)=14/2
f(5)=17/2
f(6)=20/2
f(7)=23/2
f(8)=26/2
f(9)=29/2
f(10)=32/2

suma este egala cu 187/2
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