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?
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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