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Sagot :

KIWA
1a. demander a,b ; x positif si x > -(b/a)

Bonsoir

 

ax+b >0

ax > -b

x >-b/a

 

f(x) > 0

0.64x+0.512 >0

x > -0.512 / 0.64 

x > -0.8

 

g(x) >0

-1.53x+52.02 >0

x > -52.02 / -1.53 

x > 34 

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