Zadanie 73 strona 300 Rozwiiz Rownanie Zadanie O nierownosci z modulem Zadanie W zalaczniku
Zadanie 73 strona 300
Rozwiiz Rownanie
Zadanie O nierownosci z modulem
Zadanie W zalaczniku
a) |x| + 3 =5|x| - 2 4|x| = 5 |x| = 1,25 x = ±1,25 b) 4|x + 3| = 12 |x + 3| = 3 x + 3 = 3 x = 0 x + 3 = -3 x = -6 c) -2|4x| = -12 |4x| = 6 4x = 6 x = 1,5 4x = -6 x = -1,5 d) -(3/4)|-8x| = -18 |-8x| = 24 -8x = 24 x = -3 -8x = -24 x = 3 e) |1 + 3x| = 7 1 + 3x = 7 3x = 6 x = 2 1 + 3x = - 7 3x = -8 x = -8/3 f) |2 - 3x| = 11 2 - 3x = 11 -3x = 9 x = - 3 2 - 3x = -11 -3x = -13 x = 13/3 g) 6|x +1| -20 = 4|x + 1| 2|x + 1| = 20 |x + 1| = 10 x + 1 = 10 x = 9 x + 1 = -10 x = -11 h) |2x +1| = |x + 5| 2x +1 = x + 5 x = 4 2x + 1 = -x - 5 3x = - 6 x = -2 i) |2x - 5| = |x -1| 2x - 5 = x - 1 x = 4 2x - 5 = -x + 1 3x = 6 x = 2