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Verified answer
Jika persamaan diatas difaktorkan maka akan menjadi :(x-(a+1))(x+1) = 0
x1 = a+1
x2 = - 1;x2 telah memenuhi (x2<1)
agar x1 memenuhi (x1>1) maka
x1>1
a+1>1
a>0
Jadi jawabannya = B
Semoga membantu :)