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6. Use the method of undetermined coefficients to solve: y" - 3y' - 4y = cos(t) + tet

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y(t) = c 1 e -t +c 2 e 4t... View the full answer

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4" - 34 - 4 4 = cos(t ) + text
yet ) - yc + yp
for complementary solution yc
the characteristic equation
3r - 4
2)
2 - 4rtr - 4 :0
r (r - 4 ) + 1 18 - 4 ) = 0
( r + 1 ) ( x - 4 ) = 0
r = - 1,...

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