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Sagot :

Réponse:

ex 4:

a) b= -1 et f'(x)=a= 2 f(x)= 2x-1

b) b= 3 et f'(x)=a= -2 f(x)= -2x+3

ex 5:

yb-ya/xb-xa= 3-1/3-0= 2/3 donc f'(x)=a= 2/3

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