第1737题:有趣的函数图形
ABCD四个选项是打乱后的以下四个函数的图形:
x2+y2=8+sin(xy)x^2+y^2=8+\sin(xy)x2+y2=8+sin(xy)
x2+y2=6+sin(xy)x^2+y^2=6+\sin(xy)x2+y2=6+sin(xy)
x2+y2=4+sin(xy)x^2+y^2=4+\sin(xy)x2+y2=4+sin(xy)
x2+y2=2+sin(xy)x^2+y^2=2+\sin(xy)x2+y2=2+sin(xy)
其中哪个图形是函数 x2+y2=6+sin(xy)x^2+y^2=6+\sin(xy)x2+y2=6+sin(xy) 的?
A.
B.
C.
D.