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mdeng
mdeng is offline
#53
Jan7-08, 09:58 AM
P: 65
Quote Quote by lightarrow View Post
If

[tex]v_1 = -v_2[/tex]

the denominator is not zero but

[tex]1 - v_1^2/c^2.[/tex]
I meant v_1=-v_2 and |v_1| = c. I guess it still holds.