数学JJ: 152:不论f(x)和g(x)是什么,f(x)-g(x)不是都大于等于0吗?集合的答案是怎么出来的呢?完全想不通。请教牛牛们指点迷津!
g(x)的意思是比x小的最大整数 f(x)的意思是比x大的最小整数,问哪个是f(x)-g(x)的(还是反过来,我忘了)的集合答案有(0)(1)(0,1)(-1,0)
V2f(x)表示小于等于x的最大整数;g(x)表示大于等于x的最小整数。求f(x)-g(x) 的可能值的范围。答案是表示成集合的形式的。
ANS:同意答案集合是{0,1},有人问我为什么按题目算下来是(-1,0)我写的是0和1,其实题目应该是狗主人记不清了,他答案未必选错,其实无所谓,本身会解题了,大家上考场必须重新算的,否则变体一下就不认识了。
156. DS, g(x)的意思是比x大的最小整数, g(x)-x>0 ?
同理,根据已知条件可知,g(x) - x 肯定大于0啊。A,B条件给不给都没有意义啊。。。。。
GWD:
New genetic evidence - together with recent studies of elephants' skeletons, tusks, and other anatomical features - provide compelling support for classifying Africa's forest elephants and its Savana elephants as separate species.
A. provide compelling support for classifying B. provide compelling support for the classification of C. provides compelling support to the classification of D. provides compelling support for classifying E. provides compelling support to classify
根据主谓一致排除A.B 根据Verb > Noun, 排除 B,C 什么时候用 to do, 什么时候用 for doing呢? 是说根据本句的逻辑含义吗?本句D,E能不能请NN翻译一下呢?
谢谢啦!!
DS, g(x)的意思是比x大的最小整数, g(x)-x>0 ?
同理,根据已知条件可知,g(x) - x 肯定大于0啊。A,B条件给不给都没有意义啊。。。。。
GWD:
New genetic evidence - together with recent studies of elephants' skeletons, tusks, and other anatomical features - provide compelling support for classifying Africa's forest elephants and its Savana elephants as separate species.
A. provide compelling support for classifying B. provide compelling support for the classification of C. provides compelling support to the classification of D. provides compelling support for classifying E. provides compelling support to classify
根据主谓一致排除A.B 根据Verb > Noun, 排除 B,C 什么时候用 to do, 什么时候用 for doing呢? 是说根据本句的逻辑含义吗?本句D,E能不能请NN翻译一下呢?
谢谢啦!!
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