HELP!! With TI-84 calculator?

  • Thread starter Thread starter ??Love music??
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??Love music??

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I am doing an animation for math class on my TI-84 and to double something you must multiply it by the matrix [[2,0][0,2]]. And when I asked my teacher she said to return it to normal size you redouble it and it goes back...But its not working....how do I return it to normal size?
 
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