问题描述:
gmat prep数学
prep里有这样一道数学题.
for all the positive integers m, m(这个m外面有方框)=3m if m is odd, m(方框)=1/2m if m is even. Then which of the following is equivalent to 9(方框)*6(方框)?
答案包括:81,54,36,27,18
小弟的理解是,9*3乘以6的二分之一=81.
但是答案是27.小弟十分困惑,还望指教:)
prep里有这样一道数学题.
for all the positive integers m, m(这个m外面有方框)=3m if m is odd, m(方框)=1/2m if m is even. Then which of the following is equivalent to 9(方框)*6(方框)?
答案包括:81,54,36,27,18
小弟的理解是,9*3乘以6的二分之一=81.
但是答案是27.小弟十分困惑,还望指教:)
问题解答:
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