Răspunsuri

2014-11-01T18:39:05+02:00
|x-1| + |2x-2| + |3x-3| + |4x-4| = 10
|x-1| + |2(x-1)| + |3(x-1)| + |4(x-1)| = 10
|x-1| + 2|x-1| + 3|x-1| + 4|x-1|  = 10
|x-1| · (1+2+3+4) = 10
10|x-1|=10
|x-1|=1 ⇒ x-1=1 sau x-1=-1 ⇒ x∈{2;0}