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Se considera functia f : R cu valori in R , f(x)= 2x-3 .
a) Calculati f(1)+f(2)+f(3)+f(4)+f(5)

Răspuns :

Alexgabi90ask
f(1)=2x1-3=-1
f(2)=2x2-3=1
f(3)=2x3-3=3
f(4)=2x4-3=5
f(5)=2x5-3=7

f(1)+f(2)+f(3)+f(4)+f(5)= -1+1+3+5+7=15
f(x)=2x-3
f(1)=2-3=-1
f(2)=4-3=1
f(3)=6-3=3
f(4)=8-3=5
f(5)=10-3-7
-1+1+3+5+7=15

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