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If y=e^(-x) cos x and yn+kny=0 where yn=...

If `y=e^(-x) cos x` and `y_n+k_ny=0` where `yn=(d^ny)/(dx^n)` and `k_n` are constant `n in N` then

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If y=e^(-x)cos xandy_(n)+k_(n)y=0, wherey _(n)=(d^(n)y)/(dx^(n)) andk are constants AA n in N, then (a)k_(4)=4 (b) k_(8)=-16 (c) k_(12)=20 (d) k_(16)=-24

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If y=e^(-x)cosxa n dy_n+k_n y=0,w h e r ey_n=(d^n y)/(dx^n)a n dk_n are constants AAn in N , then (a) k_4=4 (b) k_8=-16 (c) k_(12)=20 (d) k_(16)=-24

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