Author 
Comment/Response 
KurtVega

07/26/11 05:01am
"Solve" seems to fail finding the upper limit to this given integral:
Solve[Integrate[
Sqrt[(1  (6.8 x)/E^(4 x^2) + (2 x)/
Sqrt[1 + 4 x^2])^2 + (1  (6.8 x)/E^(4 x^2) + (2 x)/
Sqrt[1 + 4 x^2])^2], {x, 1.5, b}] == 0, b, Reals]
Basically I want to find the upper limit 'b' given a lower limit (here 1.5) and a curve segment length (here 0, for simplicity). However, I haven't found a way to make this work (used NSolve and NIntegrate without luck). I need to do this for a lot of upper limits  please don't tell me I need to manually find them by trial and error, because that would take hours! :)
TIA for your help!
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