What is the coefficient of in the power series expansion of ? I'm having trouble expanding this. Could someone explain how to solve it? Cheers.
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Originally Posted by Haris What is the coefficient of in the power series expansion of ? I'm having trouble expanding this. Could someone explain how to solve it? Cheers. you don't need to expand anything let the coefficient of the -term is given by
Originally Posted by Haris What is the coefficient of in the power series expansion of ? I'm having trouble expanding this. Could someone explain how to solve it? Write it as . Then use the binomial expansion of , taking t=5x/9. Edit. Alternatively, use Jhevon's method. It's equally good.
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