有几道GMAT数学题弄不懂,1、If 1050(是10的50次方) – 74 is written as an integer in base 10 notation,what is the sum of the digits in that integer?2、If x > 0,then 1/[√(2x)+√x] =3、A positive integer n is said to be “prime-sa
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![有几道GMAT数学题弄不懂,1、If 1050(是10的50次方) – 74 is written as an integer in base 10 notation,what is the sum of the digits in that integer?2、If x > 0,then 1/[√(2x)+√x] =3、A positive integer n is said to be “prime-sa](/uploads/image/z/6844377-57-7.jpg?t=%E6%9C%89%E5%87%A0%E9%81%93GMAT%E6%95%B0%E5%AD%A6%E9%A2%98%E5%BC%84%E4%B8%8D%E6%87%82%2C1%E3%80%81If+1050%EF%BC%88%E6%98%AF10%E7%9A%8450%E6%AC%A1%E6%96%B9%EF%BC%89+%E2%80%93+74+is+written+as+an+integer+in+base+10+notation%2Cwhat+is+the+sum+of+the+digits+in+that+integer%3F2%E3%80%81If+x+%3E+0%2Cthen+1%2F%5B%E2%88%9A%282x%29%2B%E2%88%9Ax%5D+%3D3%E3%80%81A+positive+integer+n+is+said+to+be+%E2%80%9Cprime-sa)
有几道GMAT数学题弄不懂,1、If 1050(是10的50次方) – 74 is written as an integer in base 10 notation,what is the sum of the digits in that integer?2、If x > 0,then 1/[√(2x)+√x] =3、A positive integer n is said to be “prime-sa
有几道GMAT数学题弄不懂,
1、If 1050(是10的50次方) – 74 is written as an integer in base 10 notation,what is the sum of the digits in that integer?
2、If x > 0,then 1/[√(2x)+√x] =
3、A positive integer n is said to be “prime-saturated” if the product of all the different positive prime factors of n is less than the square root of n.What is the greatest two-digit prime-saturated integer?
A,99 B,98 C,97 D,96 E,95
有几道GMAT数学题弄不懂,1、If 1050(是10的50次方) – 74 is written as an integer in base 10 notation,what is the sum of the digits in that integer?2、If x > 0,then 1/[√(2x)+√x] =3、A positive integer n is said to be “prime-sa
1.The answer is 440
1000...000
- 74
-------------
999...926
So it's 9*48+2+6=432+8=440
2.It could also be written as (√(2x)-√x)/x.
3.The answer is D.
"prime-saturated" is (product of all different prime factor) < √x
A.99=3*3*11,33>10,not fit
B.98=2*7*7,14>10,not fit
C.97 is prime number,definitly not fit
D.96=3*2*2*2*2*2,610,not fit