Sa se reprezinte grafic functiile:
a)f:r->R, f(x)-x la a doua -x-2
b)f:R->R, f(x)=x la a doua -2
c)f:R->R, f(x)=-7x la a doua-x+12
d)f:R->R, f(x)=3x la a doua+3x+2
e)f:R->R, f(x)= -xla a doua-1
f) F:R->R, f(x)= x la a doua +2x+1