题目内容
已知x2=(-2)2,y3=-1,求:
(1)x×y2003的值.
(2)
的值.
∵x2=(-2)2=______,∴x=______.
∵y3=-1,∴y=______.
∴x×y2003=______.
=______.
(1)x×y2003的值.
(2)
| x3 |
| y2008 |
∵x2=(-2)2=______,∴x=______.
∵y3=-1,∴y=______.
∴x×y2003=______.
| x3 |
| y2008 |
∵x2=(-2)2=4,
∴x=±2.
∵y3=-1,∴y=-1.
∴(1)x×y2003
=(±2)×(-1)2003
=±2;
(2)
=
=±8.
∴x=±2.
∵y3=-1,∴y=-1.
∴(1)x×y2003
=(±2)×(-1)2003
=±2;
(2)
| x3 |
| y2008 |
=
| (±2)3 |
| (-1)2008 |
=±8.
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