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The position of a point in time t is giv...

The position of a point in time t is given by `x=a+bt-ct^(2),y=at+bt^(2)`. Its acceleration at time t is

A

b-c

B

b+c

C

2b-2c

D

`2sqrt(b^(2)+C^(2))`

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The correct Answer is:
D
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