题目内容
若x-y=2,x2+y2=4,x4-y4=16,则x1992+y1992值为
A.4
B.19922
C.21992
D.41992
若x+y=5,x2-y2=10,则x-y=________
若x-y=2,x2-y2=10,则x+y=________.
若x-y=3,x2-y2=12,求x+y的值.
若x-y=2,x2+y2=4,求x2002+y2002的值.