Dobierz tak liczbę x aby liczby 2, (x-1),4
a) tworzyły ciąg artymetyczny
b)tworzyły ciąg geometryczny
a)
x-1=(2*4)/2
x-1=8/2
x-1=4
x=5
b)
(x-1)²=2*4
(x-1)²=8
x-1=√8 ∨ x-1=-√8
x-1=2√2 ∨ x-1=-2√2
x=2√2+1 ∨ x=1-2√2
a) (x-1) - 2 = 4 - (x-1)
x - 3 = 5 - x | +x
2x - 3 = 5 | +3
2x = 8 | :2
x = 4
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a)
x-1=(2*4)/2
x-1=8/2
x-1=4
x=5
b)
(x-1)²=2*4
(x-1)²=8
x-1=√8 ∨ x-1=-√8
x-1=2√2 ∨ x-1=-2√2
x=2√2+1 ∨ x=1-2√2
a) (x-1) - 2 = 4 - (x-1)
x - 3 = 5 - x | +x
2x - 3 = 5 | +3
2x = 8 | :2
x = 4