12.2 å¯å离åéçå¾®åæ¹ç¨ä¸ä¸é¶çº¿æ§å¾®åæ¹ç¨
12.2 å¯å离åéçå¾®åæ¹ç¨ä¸ä¸é¶çº¿æ§å¾®åæ¹ç¨
12.2 å¯å离åéçå¾®åæ¹ç¨ä¸ä¸é¶çº¿æ§å¾®åæ¹ç¨
You also want an ePaper? Increase the reach of your titles
YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.
F ( x)<br />
f<br />
( x)<br />
e<br />
ax<br />
<br />
<br />
(2)<br />
y(<br />
y ( 0) = 0 C = − F (0),<br />
ax<br />
= −<br />
[ ]<br />
y( x)<br />
e F ( x)<br />
− F<br />
− ax<br />
x<br />
at<br />
(0)<br />
= e ∫ f ( t ) e d t<br />
0<br />
− ax<br />
x<br />
= ∫<br />
at<br />
x)<br />
e f ( t ) e d t<br />
0<br />
−<br />
≤ ax<br />
x<br />
∫<br />
at k −<br />
[<br />
ax<br />
]<br />
ke e d t ≤ e<br />
ax e − 1<br />
0 a<br />
k<br />
(<br />
ax<br />
= 1 − e ) ( x ≥ 0)<br />
a