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2jj/ help me solve them.
96.有个数列,特征是:若T在此数列,则T+2必定在此数列。已知-1在此数列。则必有:
1)1在此数列
2)-3在此数列
3)5在此数列
[确认]系列导弹:-1.1.3.5.7........选1).3)
128.等边三角形边长为10,中间一个内切圆,问圆的面积
[确认]25pai/3
I think the correct answers shouled be 1.2.3
Pls think that -3+2=-1, so -3 should be in it.
128. I don't know how to get the answer. |
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