一道gwd的数学题，不知如何让下手

OwenBBB · 发表于 2013-8-12 23:09:01

What is the value of x^2yz+xy^2z+xyz^2

(1) x+y+z=18

(2) xyz=10

file:///C:/Users/TOSHIBA/AppData/Local/Temp/ksohtml/wps_clip_image-23554.png

l Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient

l Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient

l BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.

l EACH statement ALONE is sufficient

l Statements (1) and (2) TOGETHER are NOT sufficient

key：C 不懂啊~

conan0408 · 发表于 2013-8-12 23:10:54

x^2yz+xy^2z+xyz^2=（ x+y+z）* xyz

cyuyolanda · 发表于 2013-8-13 09:40:56

ls对的啊，楼主下次把符号写清楚啊。我以为是x的2yz次呢

OwenBBB · 发表于 2013-8-15 15:45:47

谢谢大家啊！其实我是直接在gwd上黏贴来的，我也是搞不清它究竟表示什么

所属分类: GMAT考试