Question

URGENT!


f:R--> f(x)=x-3
1) (a;-4)
2)(a,- $\frac{7}{2}$   )

Answer 1

1) f(a)=a-3 |
f(a)= -4. | => a-3=-4 => a =1
2). f(a)=a-3
f(a)= -7/2

a-3= -7/2 => a= -1/2

Answer 2

f:R→R
f(x)=x-3
a. A(a;-4)∈Gf ⇔
f(a)=-4
f(a)=a-3 ⇒a-3=-4⇒a=-1;
b. B(a;-7/2)∈Gf ⇔
f(a)=-7/2
f(a)=a-3 ⇒a-3=-7/2⇒a=-1/2;