[理工] [變分法]

[usa0204got (便秘)]

solve the problem y''=-y'-2y+2x+4  0≦X≦1  y(0)=1 y(1)=2
by the variation approach with the comparison functions sin(πx)
and sin(2πx)

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推 ntust661:http://www.jpier.org/PIERM/pierm04/02.08061007.pdf
→ ntust661:可以參考一下他的解法