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1) Which of the following lists the number of points at which a circle can intersect a trangle? a) 2 and 6 only b) 2, 4 and 6 only c) 1,2,3 and 6 only d) 1,2,3,4 and 6 only e) 1,2,3,4,5 and 6
这题我没懂意思。
2) The sum of first 50 positive even integers is 2250. What is the sum of the even integers from 102 to 200, inclusive? a) 5100 b) 7550 c) 10100 d) 1550 e) 20100
这题我算得结果是 11350=>[2550+25*100]+[2550+25*150] 可是不知道我的思路是不是错了。。。 |
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