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MHT CET202124 Sep 2021Morning ShiftMathematicsDifferential EquationsActual

The differential equation obtained by eliminating A and B from y=A t+B t

Options

  1. Ad^2 y d t^2 + ^2 y=0
  2. Bd ^2 y dt ^2 + y ^2=0
  3. Cd^2 y d t^2 - ^2 y=0
  4. Dd^2 y d t^2 - y^2=0

Correct answer

A. d^2 y d t^2 + ^2 y=0

Step-by-step solution

aligned & y=A t+B t & d y d t =-A t+B t & d^2 y d t^2 =-A ^2 t-B ^2 t & =- ^2(A t+B t)=- ^2 y & d^2 y d t^2 + ^2 y=0 aligned

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