Essentially thats it, I have to estimate with the trapezium rule (I can do this) then confirm with the integration by parts of xe^xdx but I just keep going round in circles. Help! Thanks
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ha, Ive just done it! No bother.
Originally Posted by tjnortham Essentially thats it, I have to estimate with the trapezium rule (I can do this) then confirm with the integration by parts of xe^xdx but I just keep going round in circles. Help! Thanks $\displaystyle u = x$ ... $\displaystyle dv = e^x \, dx$ $\displaystyle du = dx$ ... $\displaystyle v = e^x$ $\displaystyle \int u \, dv = uv - \int v \, du$ now ... where is your problem?
thanks, I was putting v=x and du/dx as e^x and kept coming back with the original integration problem as the vdu/dx part.
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