Question

7 va rog frumos!!! repede!

Answer 1

a. x<5, x∈{0,1,2,3,4}
b.x≤5, x∈{0,1,2,3,4,5}
c. x>5, x∈{6,7,8,....}, x∈N-{0,1,2,3,4,5}
d. x≥5, x∈{5,6,7,....}, x∈N-{0,1,2,3,4}
e. 3x-2<7, 3x<9, x<3, x∈{0,1,2}
f. 7-x>2, -x>-5, x<5, x∈{0,1,2,3,4}

Answer 2

a) x<5 => x∈{0,1,2,3,4}
b) x$\leq$5 => x∈{0,1,2,3,4,5}
c) x>5 => x∈{6,7,8,...}
d) x$\geq$5 => x∈{5,6,7,...}
e) 3x-2<7|+2
3x<9|:3
x<3 => x∈{0,1,2}
f) 7-x>2|+x
2+x<7
x<7-2
x<5 => x∈{0,1,2,3,4}