如果新GRE數(shù)學(xué)考點(diǎn)都沒有復(fù)習(xí)到,如何能拿到滿意的GRE數(shù)學(xué)分?jǐn)?shù)呢?所以說,想要新GRE數(shù)學(xué)考好,復(fù)習(xí)的時(shí)候一定要把新GRE數(shù)學(xué)考點(diǎn)弄扎實(shí)。下面為大家介紹GRE數(shù)學(xué)排列考點(diǎn)。
Permutation of Objects
The number of ways n distinct objects can be ordered is n!.
Example:
Number of ways 6 people can from a queue is 6!.
Number of ways 5 different cars can be parked in 5 parking spaces is 5!.
Remember:
This does not apply if there are identical objects or ordering does not matter.
Permutation with Selection
The number of ways n objects drawn from a collection of m distinct objects can be ordered is m!/(m-n)!.
Example:
Number of ways a queue of length 3 can be formed from a group of 5 people is 5!/(5-3)!=5!/2!=5*4*3=60.
Number of possible top ten list for 150 movies is 150!/(150-10)!.
Remember:
This does not apply if there are identical objects or ordering does not matter.
由于美國數(shù)學(xué)基礎(chǔ)教育的難度增加導(dǎo)致新GRE數(shù)學(xué)越來越難,但GRE數(shù)學(xué)考點(diǎn)都是高中時(shí)候?qū)W到的知識點(diǎn),考生不要過于緊張,把基本概念弄明白,再記住一些新GRE數(shù)學(xué)必備的詞匯,那么相信新GRE數(shù)學(xué)應(yīng)該沒有問題。
adj. 獨(dú)特的,不同的,明顯的,清楚的