一道GMAT数学题a,b,r,s四个正整数,a^r=b^s, 问a是否是b的factor 1）r=2s2)r=6-s请问第二个条件有可能推出结论吗?如果可以详细说明下.拜托了

一道GMAT数学题a,b,r,s四个正整数,a^r=b^s, 问a是否是b的factor 1）r=2s2)r=6-s请问第二个条件有可能推出结论吗?如果可以详细说明下.拜托了 GMAT一道数学题, 一道GMAT的数学题 一道关于GMAT的数学题 求助一道GMAT数学题xyz三个点不在一条直线上,问yz>15?a.xy=40 b.xz=60 求解GMAT一道数学题[1/(2n-1)!]-[1/(2n+1)!]简化后等于an^2+bn+c,问a+b+c等于多少? 一道数学题,求a.b. 问一道关于不等式的数学题已知a,b,c是正实数,求证：1 问一道GMAT数学题on a recent trip,cindy drove her car 290 miles,rounded to the nearest 10 miles,and used 12 gallons of gasoline,rounded to the nearest gallon.the actual number of miles pergallon that cindy's car got on this trip must have been b 求助一道GRE数学题> < r=s三次方 乘以 t六次方；st=10A=t三次方B=r/1000比较AB大小答案为什么是D cannot be determined? 高分求一道GMAT数学题.The rate of a chemical is directly proportionate to the square of A and inversely to B,if B increase 100%,what is the change of percentage of 求解一道GMAT OG if r and s are positive integers,can the fraction r/s be expressed as a decimal with only a finite number of nonzero digits?(1) s is a factor of 100(2) r is a factor of 100 GMAT Prep中的一道数学题,没看懂,Before being simplified,the instructions for computing income tax in Country R were to add 2 percent of one's annual income to the average (arithmetic mean) of 100 units of Country R's currency and 1 percent o 数学题一道,已知a、b、c属于R+,且a+b+c=1求证…… 一道数学题,有关立体几何的有三个球,第一个与正四面体的四个面都相切,第二个与这个正四面体的棱都相切,第三个过这个正四面体的所有顶点,则这三个球的球面面积之比为（ ）A.1∶2∶3 B.1 一道数学题,集合设a,b∈R,集合｛1,a+b,a｝=｛0,b,a/b｝求b—a 请大神讲解一道GMAT数学题……Ify is an integer,then the least possible value of|23 —5y| is(A) 1(B) 2(0 3(D) 4(E) 5 What letter should replace the question mark? ? E B B A S A I N A R T S N D S每四个一组。说明理由