微積分求極值

Question

suppose that f(x)=l x^2-1 l

find

(a)f'(x) and f"(x)

(b)the intervals on which f is decreasing or increasing and

the local extrema of f

(c)the intervals on which the graph f is concave downward or

concave upward and the points of inflection

Answer 1

Favorite Answer

這個題目你該注意的是,x=1,-1處會產生轉折點!所以在這兩個點的導數都不存在!!另外我也給了另一個類題供你練習參考(see my blog)!

圖片參考：http://img170.imageshack.us/img170/7807/87391398cx...

Source(s): myself