Question

which of the following is not a function?
A.y= [2x]^2 + 3
B.x ^2 + y ^2 =9
C.{ (1,2) (2,3) (3,4) }
D.x -y = 1

Answer 1

Step-by-step explanation:

Answer

Given equation:

2x2+xy−3y2+x+ay−10=(2x+3y+b)(x−y−2)

⇒2x2+xy−3y2+x+ay−10=2x2+3xy+bx−2xy−3y2−by−4x−6y−2b

⇒2x2+xy−3y2+x+ay−10=2x2+xy−3y2+(b−4)x−(b+6)y−2b

Comparing the coefficients of x,y  and constants will get:

b−4=1..(i)

−(b+6)=a..(ii)

−2b=−10..(iii)

From eq(1), we get

⇒b=5

Now put b in eq(2), we get

⇒−(b+6)=a

⇒a=−11

From eq(3), we get 

⇒−2b=−10

⇒b=5

Hence  values  of  a,b are −11,5

Answer 2

Answer:

Here 1.is not a function