0＜p＜1 Quantity A: The greatest value of p(1-p) Quantity B: 1/2

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问题 0＜p＜1
Quantity A: The greatest value of p(1-p)
Quantity B: 1/2

选项 A、Quantity A is greater.
B、Quantity B is greater.
C、The two quantities are equal.
D、The relationship cannot be determined from the information given.

答案B

解析 p(1-p)=-p²+p=-(p-1/2)²+1/4，或由二次函数对称轴方程x=-b/2a=-1/2可知，当p=1/2时，该式达到最大值为1/4，1/4＜1/2，故答案为B。

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0＜p＜1 Quantity A: The greatest value of p(1-p) Quantity B: 1/2

GRE QUANTITATIVE

GRE

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Thereasonwhysomepeopleareunlikelytosucceedinlifeisthatthey______.Whichofthefollowingstatementsismostimpor

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WhatarethedifferencesbetweenpublicandprivateinAmericanhighereducation?Abigdifferenceinvolvesmoney.Publiccolleg

Ifathree-digitnumberisselectedatrandomfromtheintegers100to999,inclusive,whatistheprobabilitythatthefirstdi

The9participantsinaraceweredividedinto3teamswith3runnersoneachteam.Ateamwasawarded6-npointsifoneofit

如果将小数0.123456789101112…无限不循环地把所有整数都列出来，那么小数点后第100位的数字是多少?

Thepassageisprimarilyconcernedwith______Theauthor’sattitudetowardtheviewthatlivingthingsaredividedintothreec

Ifthelengthsoftwoofthesidesofatriangleare9and10,whichofthefollowingcouldbethelengthofthethirdside?Ⅰ.

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