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## Homework Statement

A rocket flies between two planets that are one light-year apart. What

should the rocket’s speed be so that the time elapsed on the captain’s watch

is one year?

## Homework Equations

I have v = d'/t'

d'=d/ϒ

t'=1 year

d=1 light year

## The Attempt at a Solution

Will the equations I use vϒ=d/t' but I get complex roots as an answer. What am I doing wrong?