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Answered

on donne x=1/3 ; y=6/5 ; z=-1/15 exprimer sous forme fractionnaire simplifiée A=x+1/y+z ; B=x(y-z) ; C=x-y/x+y​

Sagot :

A = (1/3 + 1) / (6/5 - 1/15)

A = 4/3 / 17/15

A = 4/3 * 15/17  = 4*3*5 /3*17 = 20/17

B = 1/3( 6/5 + 1/15 )

B = 1/3 * 6/5  + 1/3 * 1/15 = 6/15 + 1 /45  = 18/45+1/45 = 19/45

C =  (1/3 - 6/5) / (1/3 + 6/5 )

       (5/15 - 18/15) / (5/15+18/15)

      -13/15 * 15/23

       -13*3*5/23*3*5 = -13/23

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