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Q11. If x = at2, y = 2at, then  d 2 y d x 2 =
      a - 1 t 2                                 b   1 2 at 3                             c   - 1 t 3                               d   - 1 2 at 3
 

Dear student


Differentiate it w.r.t.x., we getd2ydx2=-1t2×dtdx=-1t2×12at=-12at3
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