题目内容
化简求值:a3(-b3)2+(-
ab2)3,其中a=
,b=4.
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a3(-b3)2+(-
ab2)3,
=a3b6+(-
a3b6),
=
a3b6,
当a=
,b=4时,原式=
×(
)3×46=56.
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=a3b6+(-
| 1 |
| 8 |
=
| 7 |
| 8 |
当a=
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| 4 |
| 7 |
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