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5x-10 ≥ 0
5x ≥ 10
x ≥ 2
x∈<2,∞>
f(x) = 5x-10+3
f(x) = 5x-7
Drugi przedział :
5x-10 < 0
5x < 10
x < 2
f(x) = -5x+10+3
f(x) = -5x +13
x∈(-∞,2)