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Solution :

From the given equation, `m_(0)/m=sqrt(1-v^(2))` <br> Left hand side is dimensionless. <br> Therefore, right hand side should also be dimensionless. <br> It is possible only when `sqrt(1-v^(2))` should be `sqrt(1-v^(2)/c^(2))`. <br> Thus, the correct formula is `m=m_(0) (1-v^(2)/c^(2))^(-1//2)`Related Video

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