问题
填空题
观察下列各式；
12+1=1×2
22+2=2×3
32+3=3×4
…
请把你猜想到的规律用自然数n表示出来______．
答案
根据题意可知规律n2+n=n（n+1）．
搜题请搜索小程序“爱下问搜题”
观察下列各式；
12+1=1×2
22+2=2×3
32+3=3×4
…
请把你猜想到的规律用自然数n表示出来______．
根据题意可知规律n2+n=n（n+1）．
| 从方框内选出短语，并用其适当形式填空。 | |
| 1. Jenny likes to eat lots of fruits, _________ bananas and oranges. 2. I want to be a teacher _________ a scientist in the future. 3. The two runners took different routes, but they both_______ in the same place. 4. When I_______ this morning, it was already nine o’ clock. 5. We are_________ a school trip next Sunday.
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