How would you find the series for x^2(cosx)?
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Originally Posted by helpplz How would you find the series for x^2(cosx)? What is the M.S. for $\displaystyle cos(x)$ ?
1 - (x^2)/2! + (x^4)/4! .... I just don't know what you would do with the coefficient of x^2...
Originally Posted by helpplz 1 - (x^2)/2! + (x^4)/4! .... I just don't know what you would do with the coefficient of x^2... Just multiply the series by $\displaystyle x^2$
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