The product of two facing pages of a book is 992.Find the two pages numbers.
问题描述:
The product of two facing pages of a book is 992.Find the two pages numbers.
亲们,麻烦看到了就回答下吧,
答
两个相邻页面页数的乘积是992.找出这两个页数来.设页数1为x,则页数2必然为x+1.x (x + 1) = 992因为x必须是正整数,解得x = 31所以是第31和第32页. 为什么是31?根号992 = 31.5,介于31和32之间,所以就是这两个数了. 如...