a; f(0)=0

f(-1/3)=-1

b: y=-6 thì 3x=-6

hay x=-2

y=12 thì 3x=12

hay x=4

OK cảm ơn nha 

\(f\left(-3\right)=\left(-3\right)^2+1=9+1=10\)

\(f\left(-1\right)=\left(-1\right)^2+1=1+1=2\)

\(f\left(3\right)=3^2+1=9+1=10\)

\(f\left(0\right)=0^2+1=1\)

\(f\left(-\dfrac{1}{2}\right)=\left(-\dfrac{1}{2}\right)^2+1=\dfrac{1}{4}+\dfrac{4}{4}=\dfrac{5}{4}\)

\(f\left(\dfrac{1}{2}\right)=\left(\dfrac{1}{2}\right)^2+1=\dfrac{1}{4}+\dfrac{4}{4}=\dfrac{5}{4}\)

\(f\left(\dfrac{2}{3}\right)=\left(\dfrac{2}{3}\right)^2+1=\dfrac{4}{9}+\dfrac{9}{9}=\dfrac{13}{9}\)

\(f\left(-\dfrac{2}{3}\right)=\left(-\dfrac{2}{3}\right)^2+1=\dfrac{4}{9}+\dfrac{9}{9}=\dfrac{13}{9}\)

b: f(5)=15

f(-7/12)=-7/4

a: f(-2)=6

f(3)=-9

câu b đâu ạ

      Giải:

Bài 1: lần lượt thay các giá trị của x, ta có:

_Y=f(-1)= -5.(-1)-1=4

_Y=f(0)= -5.0-1=1

_Y=f(1)= -5.1-1=-6

_Y=f(1/2)= -5.1/2-1=-7/2

 Bài 2:

 Lần lượt thay các giá trị của x, ta có:

_Y=f(-2)=-2.(-2)+3=7

_Y=f(-1)=-2.(-1)+3=1

_Y=f(0)=-2.0+3=3

_Y=f(-1/2)=-2.(-1/2)+3=4

_Y=f(1/2)=-2.1/2+3=2

1.

y=f(-1)=3*(-1)-2=-5

y=f(0)=3*0-2=-2

y=f(-2)=3*(-2)-2=-8

y=f(3)=3*3-2=7

Câu 2,3a làm tương tự,chỉ việc thay f(x) thôi.

3b

Khi y=5 =>5=5-2*x=>2*x=0=> x=0

Khi y=3=>3=5-2*x=>2*x=2=>x=1

Khi y=-1=>-1=5-2*x=>2*x=6=>x=3

f(-1)=3.1-2=3-2=1

f(0)=3.0-2=0-2=-2

f(-2)=3.(-2)-2=-6-2=-8

f(3)=3.3-2=9-2=7

Bài 1 : làm tương tự với bài 2;3 nhé

Ta có : \(f\left(0\right)=c=2010;f\left(1\right)=a+b+c=2011\)

\(\Rightarrow f\left(1\right)=a+b=1\)

\(f\left(-1\right)=a-b+c=2012\Rightarrow f\left(-1\right)=a-b=2\)

\(\Rightarrow a+b=1;a-b=2\Rightarrow2a=3\Leftrightarrow a=\dfrac{3}{2};b=\dfrac{3}{2}-2=-\dfrac{1}{2}\)

Vậy \(f\left(-2\right)=4a-2b+c=\dfrac{4.3}{2}-2\left(-\dfrac{1}{2}\right)+2010=6+1+2010=2017\)

a: f(-2)=-6+1=-5

f(1/2)=3/2+1=5/2