2016年2月26日GRE數學機經預測

2016/01/20 瀏覽次數:4 收藏
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  GRE測驗是眾人舉行美國研討生持續進修的癥結,以是眾人必定要捉住任何機遇好好溫習。GRE測驗機經是眾人在溫習的時刻不容疏忽的一個部門,對考生的贊助異常大。下面,是小編為眾人整頓的GRE測驗2016年2月26日數學猜測機經,考生必定要細心研討。

  What are the x-intercepts of the parabola defined by theequation y =2x2–8x –90?

  Indicate allx-intercepts.

  A. -10

  B. -9

  C. -5

  D. -4

  E. 4

  F. 5

  G. 9

  H. 10

  剖析:C, G

  由於求x軸截距,以是y=0,以是2x2–8x –90=0,以是(2x+10)(x-9)=0. 以是x= -5, 大概x=9. 以是選C,G.

  The system of equations has how many solutions?

  3x - 6y = 9

  2y - x - 3 = 0

  A. None

  B. Exactly 1

  C. Exactly 2

  D. Exactly 3

  E. Infinitely many

  剖析:B

  由於3x - 6y = 9,以是x-2y=3. 由於2y - x - 3 = 0,以是2y-x=3. 以是x-2y=2y-x. 以是x=0,y=0.只有這一種大概。以是選B.

  1. If x=3k/√5 and k>0, which of the following must be true?

  剖析:C

  由於 ,以是x=(3√5)/5 k,以是k

  For the 3 numbers in a certain list, the average (arithmetic mean) and the median are equal to 16. If the greatest number in the List is 14 greater than the least number, what is the greatest number in the list?

  剖析:23

  設最小的數為x,由於最大的數比最小的數大14,以是最大的數為x+14.由於這三個數的均勻值為16,且中央的數值為16,以是(x+16+(x+14))/3=16.以是x=9. 以是最大的數為9+14=23.

  When thepositive integer dis divided by 12, the remainder is 5. Whatis the remainder when d is divided by 8 ?

  A. 1

  B.3

  C.5

  D.6

  E.7

  剖析:A

  正整數d被12整除後余5,是以正整數d為12*5+5=65. 以是〖65〗^2除以8即是528余1.以是選A。

  In agroup of 60 people, the average (arithmetic mean) age of the 40 females is 60,and the average age of the 20 males is 70.

  Column A ColumnB

  Average age of all 60 people 65

  A. Thequantity in Column A is greater

  B. Thequantity in Column B is greater

  C. The twoquantities are equal

  D. Therelationship cannot be determined from the information given

  剖析:

  由於一共有60小我,40小我的均勻年紀是60歲,20小我的均勻年紀是70歲。以是這60小我的均勻年紀為(40*60+20*70)/60=63.33. 63.33<65,以是B更大。以是選B。

  以上便是GRE測驗2016年2月26日的數學猜測機經,願望對眾人有贊助。

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