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Wzór funkcji liniowej: f(x) = ax + b, gdzie a,b ∈ R
{ f(x) = ax + b
{ f(x+1) = ax + b + 2
{ 2 = a*1 + b
{ a(x+1) + b = ax + b + 2
{ a + b = 2
{ ax + a + b - ax - b = 2
{ a + b = 2
{ a = 2
{ 2 + b = 2
{ a = 2
{ b = 2 - 2
{ a = 2
{ b = 0
{ a = 2
{ a = 2
{ b = 0
Wzór funkcji ma postać: f(x) = 2x