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Error on M2 Edexcel June 2004 paper?

Hi, please take a look at this question and help me because I'm either overlooking something or it's an error on the mark scheme.

The question is Q4 a) (vectors):


My answer (I used r= ro + vt)


The mark scheme answer


Where have I gone wrong please?
Reply 1
You have to integrate the expression and find the constant using the information you've been given.
Reply 2
Original post by olipal
You have to integrate the expression and find the constant using the information you've been given.


Thanks...I need to stop trying to answer questions with M1 knowledge!

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