Hello everyone, can you tell me what i'm doing wrong here? The question says:(adsbygoogle = window.adsbygoogle || []).push({});

Determine which of the following pairs of functions are linearly independent.

1. f(x) = x^2\quad, g(x) = 4|x|^2

2. f(x) = x^3\quad , g(x)=|x|^3

3. http://cwcsrv11.cwc.psu.edu/webwork2_files/tmp/equations/24/4509f1c45a8fe2f376f4b191d2975d1.png [Broken]

4. f(t) = 2t^2+14t, g(t)=2t^2-14t

Here is my work:

http://img132.imageshack.us/img132/9587/lastscan4zm.jpg [Broken]

Once i put it in the form of y1y2'-y1'y2, i would plug in 0 for t, and if th4e answer was != 0, I thought it was L.I.

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# Linear Indepdant or not? the Wronskin != 0, so whats going on!

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