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If y=e^(ax)cosbx, then prove that : (d...

If `y=e^(ax)cosbx`, then prove that :
`(d^(2)y)/(dx^(2))-2ady/dx+(a^(2)+b^(2))y=0`.

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MAHAVEER PUBLICATION-DIFFERENTIATION OR DERIVATIVE OF A FUNCTION-QUESTION BANK
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