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Sagot :

(1+t/100)²=1,5
(1+t/100)(1+t/100)=1,5
1+t/100+t/100+(t/100)²=1,5
1+2t/100+100t/100t=1,5
1+2t/100+1=1,5
2+2t/100=1,5
2t/100=1,5-2
2t/100=-0,5
2t=-0,5x100
t=-50/2
t=-25

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