3.The sum of two nonnegative numbers is 20. Find the numbers
(a)if the product of one number and the square root of the other is to be
as large as possible;
(b)if one number plus the square root of the other is to be as large as
possible.
我看不懂這題在說啥@@，請問要怎麻解？
4
6. (a) Evaluate ∫ log x /x dx.
1 2
(b) Solve the equation
dy
x— = x^2 + 3y
dx
given the initial condition y(1)=2
(a)題的log是要直接化成lnx/ln2去積嗎？
(b)題不太懂......
題目都沒答案，寫完都不知道對不對@@
煩請各位高手相助~QQ
--
e◢█████◣
所謂的JUMP三要素啊..... <▆> <▆>
█ █ ▁
就是 友情 ▆▅▄▃▄▅▆
努力 ═══ ═══
傑士塔威
--
※ 發信站: 批踢踢實業坊(ptt.cc)
◆ From: 122.121.201.135