※ 引述《areyoucrazy (我知道你不愛我)》之銘言：
: 請大家幫我解下列幾題,謝謝!!
: 1.The president of a major housing construction firm reports that the number
: of construction jobs(in millions)created is given by
: N(x)=1.42x
: where x denotes the nimber of housing starts.Suppose the number of housing
: starts in the next t mo is expected to be
: 2
: 7(t+10)
: X(t)=────────
: 2
: (t+10)+2(t+15)
: million units/year.Find an expression for the number of jobs created per month
: in the next t mo.How many jobs will have been created 6 months and 12 mo from
: now?
這題根本不是微積分,只是兩個函數的題目!
(1)The relationship between the # of jobs created per month in the next t months.
is : N(t)=1.42{[7(t+10)^2]/[(t+10)^2+2(t+15)]} (in millions)
(2)Plug #in:
6 months:
X(6)=1.42{[7(6+10)^2]/[(6+10)^2+2(6+15)]}=8.56781144(in millions)
X(12)同上算法~
(我累了~我想睡了Sorry喔!)
: 2.power function是什麼???
: -3 -2
: H(x)=2X +5X +6 是什麼function??
: 3. b+1
: lim ─── 是多少??
: b→-3 b+3
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