GMAT数学(博智教材)第62页:If X is equal to the sum of the even integers from 40 to 60, inclusive, and y is the number of even integers from 40 to 60, inclusive, what is the value of x+y?
X=40+42+44......60=550
Y=(60-40)/2+1=11, 答案应该是561,为什么书后面的答案显示是560?
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sysadmin
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麻烦金老师回答,这题because 后面说明原因,原因还比较长,一句完整的话比较好,所以我首先考虑 A C D 然后在对比差异点上 关于到底是 especially 还是 specially ,还有削弱能力这个表达上实在选不出ACD 哪个更好 不是特别清晰
麻烦金老师帮我辨析一下BC 我能大概GET这题是在考比较考点,就是少数名族毕业生比其它类型的毕业生的四倍,我比较迷惑的点是C答案里面的这个as as ,这个不是同级比较么?顺着读,少数名族毕业生接近四倍和其它毕业生一样,感觉不通顺,相反我觉得B答案少数名族毕业生比其它类型的多四倍,读起来顺一点。我对比较级的这几个词理解的不是很透彻,麻烦老师帮忙辨析一下。
请数学老师讲解 一下图片题
另外我之前问的一道题 您没有解答清楚b选项
A certain list consists of 3 different numbers. Does the median of the 3 numbers equal the average (arithmetic mean) of the 3 numbers?
(1)The range of the 3 numbers is equal to twice the difference between the greatest number and the median.
(2)The sum of the 3 numbers is equal to 3 times one of the numbers.