If utility is given by $U ( x , y ) = x ^ { 2 } + 2 x y + y ^ { 2 }$ ,this person's indifference curves are
A)parabolas.
B)hyperbolas.
C)concentric circles.
D)straight lines.

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The Answer of If utility is given by $U ( x , y ) = x ^ { 2 } + 2 x y + y ^ { 2 }$ ,this person's indifference curves are
A)parabolas.
B)hyperbolas.
C)concentric circles.
D)straight lines.

If Utility Is Given By U(x,y)=x2+2xy+y2U ( x , y ) = x ^ { 2 } + 2 x y + y ^ { 2 }U(x,y)=x2+2xy+y2

If Utility Is Given By $U ( x , y ) = x ^ { 2 } + 2 x y + y ^ { 2 }$