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Sagot :

HIYAAZIZ131

Salut.

ex 56 -> f(x) = -7x +3

f(-4)= -7x +3

f(-4)= -7*(-4) +3

f(-4)= 28 +3

f(-4)= 31

f(17)= -7*17 +3

f(17)= -119 +3

f(17)= -116

f(-18)= -7*(-18) +3

f(-18)= 126 +3

f(-18)= 129

f(20)= -7*20 +3

f(20)= -140 + 3

f(20)= -137

ex 57 ->

a- -1

b- -2

c- 1

d- 1/2

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