Răspunsuri

2014-09-21T16:24:10+03:00
Un punct apartine unui grafic daca f(x)=y,unde x si y sunt coordonatele punctului
A(0,1)
B(1,1)
C(-2,-11)
D(-2,10)
E(-3,16)
f(x)=4x-3
A⇒f(0)=-3 deci∉gr
B⇒f(1)=1 ∈gr
C⇒f(-2)=-8-3=-11∈gr
D⇒f(-2)=-11∉gr
E⇒f(-3)=-12-3=-15∉gr
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f(x)=-5x+1
A⇒f(0)=1 ∈f(x)
B⇒f(1)=1∈gr
C⇒f(-2)=10+1=11∉gr
D⇒f(-2)=11∉gr
E⇒f(-3)=15+1=16∈gr
1 5 1