20道代數題,30道幾何題,
題目:
20道代數題,30道幾何題,
解答:
1.滿足n^3+100能被n+10整除的最大正整數n=______.
n^3+100
=n^3+1000-900
=(n+10)*(n^2-10n+100)-900
∴如果(n+10)|(n^3+100)
那麼:(n+10)|900
∴n+10
題目:
20道代數題,30道幾何題,
解答:
1.滿足n^3+100能被n+10整除的最大正整數n=______.
n^3+100
=n^3+1000-900
=(n+10)*(n^2-10n+100)-900
∴如果(n+10)|(n^3+100)
那麼:(n+10)|900
∴n+10
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