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Sagot :

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bonsoir

f (x) = 5 - 3 x

f (0) = 5

f ( 1) = 5 - 3 = 2

f ( - 2 ) = 5 + 6 = 11

antécédents

5 - 3 x  = - 1

- 3 x = - 1 - 5

- 3 x = - 6

x =  2

5 - 3 x = 14

- 3 x = 14 - 5

- 3 x = 9

x =  - 3

5 - 3 x = 0

- 3 x = - 5

x = 5/3

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