xyz are different prime numbers larger than 1, abc are positive integers, ask if x^a*y^b*z^c>[forgot the number.] 1)x+y+z=5 2) forgot... chose both
-- by 会员 epanama (2011/12/6 0:30:44)
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楼主 能不能确认下题目阿。。。我选不了both 阿 求指教!!! 114、【epanama】xyz are different prime numbers largerthan 1, abc are positive integers, ask if x^a*y^b*z^c>[forgot the number.]
1)xyz=30 2) a+b+c=5 chose both 思路:different prime numbers larger than 1 :for exemple , choose 2, 3,5 ,their sum is 30. So the possibility of x,y,zis ( 2,3,5) the same reasonthe possibility of a,b,c is ( 1,1,3) or( 2,2,1) so the rang of x^a*y^b*z^c is (120, 750)