Re: [情報] 微甲林紹雄班 10/8 小考

[wanderer (哇拉拉~)]

※ 引述《yaochia (微笑中˙請錄影)》之銘言：
: A.Determine whether the following limits exist. If yes, find its limit value.
:              2
:   (a) lim   x  - 1
:       x->1 -------
:            |x - 1|
:              --2------
:   (b) lim  (/ x +3x +1 +x)
:       x->∞
:   Ans. (a) limit doesn't exist
:        (b) -1.5
: B. Is there a real number c such that the function f defined by
:                                      2
:                              cx + 10c       if x <= 3
:                    f(x) =      2
:                              cx - 1         if x > 3
:    is continuous on (-∞,∞)?
:    Ans. c doesn't exist.
: C. Show that the sum of the x- and y- intercepts of any tangent line to the
:           _    _    _
:    curve /x + /y = /c is equal to c.
: D. A plane flying with a constant speed of 400 km/h passes over a ground
:    radar station at an altitude of 1.5 km and climbs at an angle of 30 degree.
:    At what rate is the distance from the plane to the radar station increasing
:    a minute later ?
:           890
:    Ans. -----------  km/min
:            ______
:         3 / 2041
你算出來了!?
真有毅力
話說我最後二十分鐘呆在那邊
一直反覆考慮要不要計算出來
最後呆呆地沒檢查
然後我A(b)搞笑地錯掉了~.~

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◆ From: 61.224.140.14
→ yaochia:我只能說最後一題一定對..
→ yaochia:因為我跟帥爺對過..
→ wanderer:其他的也都對啊！~
→ yaochia:ps.其實最後一題我算錯了..
→ yaochia:我分子算成1700