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Sagot :

YAYAMOHAMED

Explications étape par étape:

f(5) = 5³ - 3•5² + 2•5 + 1

= 61

f(-2) = (-2)³ - 3•(-2)² + 2•(-2) + 1

= -23

f(1/3) = (1/3)³ - 3•(1/3) + 2•(1/3) +1

= 37/27

MAA128
F(5)= 5x3-3x2+2x5+1
F(5)= 15-6+10+1
F(5)=20

F(-2)= -2x5-3x2+2x(-2)+1
F(-2)= -10-6+(-4)+1
F(-2)= -20+1
F(-2)= -19

F(1/3) = 1/3x3-3x2+2x1/3+1
F(1/3)= 1-6+2/3+1
F(1/3)= -5+2/3+1
F(1/3)= -5+5/3

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