The question is attached. I know the power series representation of cos(x) and therefore can get cos(6x^2)/x^2 but I don't know what to do about the -1. Any help would be greatly appreciated! Thanks in advance!
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Start with the known Maclaurin series of then and finally For a Macluarin series, the coefficent of the term is The coefficient of the term in the above Macluarin series is so EDIT: and
Last edited by Random Variable; May 17th 2010 at 02:01 PM.
How do you get from the before-last step to the last one? (From the one that says "so" to the one with the emoticon)
the 10! came from the exponent on . If you were to take the derivative of that 10 times, you would get
Originally Posted by s3a How do you get from the before-last step to the last one? (From the one that says "so" to the one with the emoticon) It should be
Oh that 10! was also tricky but I get it now! Thanks!
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