Dsolve different answer with book

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Andrey
Andrey 2013-5-30
Hello! I "Differential equations with Matlab" book. In problem set 1.2 17 a(t)=1/(t+1)^3, v0=0; x0=0; book's answer 1/2[(t+1)^-1 + t-1] but matlab dsolve('D2y=1/ ((t+1)^3)', 't') give me C1 + C2*t + 1/(2 * (t+1)) and after subs -> 1/2(t+1).
Why different answer? Or I something miss?

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Andrey
Andrey 2013-5-30
SOLVED dsolve('D2y=(t+1)^-3', 'Dy(0)=0', 'y(0)=0')

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