Oblicz odległość między liczbami :
a) 2 i (-12)
b) -5 i 24
c) -4,3 i 2,8
d)-1 + \sqrt{2} i \sqrt{2}
e)4 i 1,6
f)-7 + -12
Rozwiąż równania:
a) IxI = 1
b) Ix +7,3I = 0
c) Ix-6I = -4
d) Ix+3I = 7
e) I5-xI = 1
F) I8+xI = 2
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a) |2 - (-12)| = 14
b) |-5 - 24| = 29
c) |-4,3 - 2,8| = 7,1
d) |-1 + √2 - √2| = 1
e) |4 - 1,6| = 2,4
f) |-7 - 12| = 19
|x| = 1
x = 1 ∨ x = -1
|x + 7,3| = 0
x + 7,3 = 0 => x = -7,3 ∨ -x - 7,3 = 0 => x = -7,3 więc x = -7,3
|x-6| = -4 błędny przykład
|x+3| = 7
x + 3 = 7 ∨ -x -3 = 7
x = 4 ∨ x = -10
|5-x| = 1
5 - x = 1 ∨ -5 + x = 1
x = 4 ∨ x = 6
|8+x| = 2
8+x = 2 ∨ -8 - x = 2
x = -6 ∨ x = -10
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