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| Deletions are marked like this. | Additions are marked like this. |
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| c=var('c') # An arbitary Constant | c=var('c') # An arbitary Constant |
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| u=sin(9*t)*sin((1/4)*x) | u=cos(4*t)*sin(2*x) |
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| }}} |
Book
Advanced Engineering Mathematics
Author
Erwin Kreyszig
Edition
8th Edition
