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The distance travelled by a particle in ...

The distance travelled by a particle in `n^(th)` second is `S_n =u+a/2 (2n-1)` where u is the velocity and a is the acceleration. The equation is 

A

dimensionally true

B

dimensionally false

C

numerically may be true or false

D

1 and 3 are correct

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The correct Answer is:
A
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