Question

ex 8 clasa a 8 a functii​

Answer 1

Răspuns:

f(1)=-1+3=2

f(2)=-2+3=1

f(3)=-3+3=0

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f50)=-50+3=-47

2+1+0+...+(-47)

3+...-(1+2+3+...47)

1+2+3+...+47=47×48:2=1128

1128+3=1131