Question

5. Determinaţi xe R, astfel încât:
a) Ix +3| = 2;

b) |3 - 2xl = 5;

c) |x + 1| = -2;

d) (x - 2) = 2​

Answer 1

a) Ix +3| = 2

x + 3 = 2

x = 2 - 3

x = -1

b) |3 - 2xl = 5;

3 - 2x = 5

-2x = 5-3

-2x = 2

x = -2/2

x = -1

c) |x + 1| = -2;

x + 1 = -2

x = -2 -1

x = -3

d) |x-2| = 2

x - 2 = 2

x = 2+2

x = 4

x € R: {-3; -1; 4}