99...9×99...9+199...9
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99...9× 99...9+199...9
=99...9× 99...9+2×99...9+1
= (99...9+1)²
=100...0²
=100...0(200个0)
=99...9× 99...9+2×99...9+1
= (99...9+1)²
=100...0²
=100...0(200个0)
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2012-08-09
展开全部
99...9× 99...9+199...9
=99...9× 99...9+2×99...9+1
= (99...9+1)²
=100...0²
=100...0(200个0)
=99...9× 99...9+2×99...9+1
= (99...9+1)²
=100...0²
=100...0(200个0)
已赞过
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评论
收起
你对这个回答的评价是?
展开全部
99...9× 99...9+199...9
=99...9× 99...9+2×99...9+1
= (99...9+1)²
=100...0²
=100...0(200个0)
希望采纳
=99...9× 99...9+2×99...9+1
= (99...9+1)²
=100...0²
=100...0(200个0)
希望采纳
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展开全部
根号99…9X99…9+199…9
=根号99…9X99…9+2×99…9+1
= 根号(99…9+1)的平方
=99…9 +1
=100…
=根号99…9X99…9+2×99…9+1
= 根号(99…9+1)的平方
=99…9 +1
=100…
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