Question

trasati graficul functiei f:R__R, f(x)=2x+b, b apartine R stiind ca f(-2)=1 urrrgggggggeeeeeeeeeeennnnnnnttttttt
pun coroana!

Answer 1

f(-2)=1<=>2*(-2)+b=1<=>-4+b=1<=>b=1+4<=>b=5=>f(x)=2x+5                            f(0)=2*0+5=0+5=5 si fie f(x)=0<=>2x+5=0<=>2x=-5<=>x=-5/2=>                        graficul functiei trece prin punctele A(0;5) si B(-5/2;0);