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So, basically this [ http://www.wolframalpha.com/input/?i=(2/+sqrt(1-+400000000^2/300000000^2)) ] equation shows that it is pretty impossible to fly faster than the speed of light in vacuum, because the you have to deal with sqrt of negative numbers and thats just bad. Ok, fine. What else is new?

Oh, i know! This!: what if I take everything in the equation to the power of 4? Like this: [ http://www.wolframalpha.com/input/?i=(2^4/+sqrt(1-+400000000^2/300000000^2)^4) ]

of course, the result is in power of 4 too, but! - there is no negative numbers and problems!

This is a equation for mass increase while traveling at velocity near (faster? ) the speed of light in vacuum (c).

starting mass is 2(kg)

The resulting mass from traveling at 1.33 (?) c is ~26.45^1/4 .. well.. this : [ http://www.wolframalpha.com/input/?i=(2^4/+sqrt(1-+400000000^2/300000000^2)^4)^1/4 ]

Flying faster than c? No problem! .... except that there is a problem! :( - at least form my, not-that-much-educated, point of view.