[積分] 90政大資管

[t90766 (Feng)]

           x
Let f(x)=∫  e^[(t-1)/t^2] dt, x≧1. Find the interval(s)
           1
where f is concave upward, and the interval(s) where f is concave downward.


微了一次還是e...要怎麼解呀= =???

先感謝各路高手!!!

--
※ 發信站: 批踢踢實業坊(ptt.cc) 
◆ From: 220.132.175.253