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Sagot :

VINS

bonsoir

k ( 7) = 4  et  k ( - 7 ) = 6

( 6 - 4 ) / ( - 7 - 7 ) =   - 2 /14 = - 1 /7

ax =   - x /7

k ( 7) = 4

- 7/7 + b = 4

b =  4 + 1 = 5

k ( x) = - x /7 + 5

d'où  k ( - 7) =  1 + 5 = 6

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