The rate of increase in monthly sales,S,of a new product is proportional to the sales of the product,S,and 1000-S. If monthly sales are 100 units when t = 0 and 400 units after one month at t = 1 ,what will sales be after two months,at t = 2 ?
實在看不懂題目前面 The rate........一直到1000-S 說的到底是什麼意思
S是S和1000-S的比例嗎?不太懂題目的意思.....請各位高手教教我怎麼算
這一題我也沒解答.......拜託了 !!
