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Sagot :

Bonjour,

n° 44:

A= 2x/(x+1)-x/(x+1)= x/(x+1)

B= 1/(x+1)+1/x= (x+x+1)/x(x+1)= (2x+1/(x²+x)

C= x/4-4/x= [ (x*x) - (4*4) ] /(4*x)= (x²-16)/ (4x)

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