which of the following sets of functions are linearly independent

Posted on 2014-03-22 11:49:00 in Math by BATISYSA

which of the following sets of functions are linearly independent.

1. 
   sin x, cos x, sin 2x


2. 
   1+x, 1+2x, x²


3. 
   x² – x + 1, x² – 1, 3x² – x – 1.

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