HP 40GS stuck on the hourglass for the calculation of certain integrals

So I used my calculator HP40GS for awhile, and I've never had problems with it.

Recently, when reviewing for the examination of calculation AP, I noticed that the calculator could not do some integrals. Because I already went through the lesson using the graphing calculator calculators and integrals without problem using my computer, I don't think that there is nothing special about this one.

One of the integrals in question is 3 * e ^(-x/2) * sin (2 x) on the interval [0,2].

I tried to make the home screen capture (in the mode of operation):

∫ (0,2,ABS (3rd ^(-x/2) * sin (2 x)), x)

The calculator has been blocked at least five minutes on the same screen with the little hourglass until I pressed on 'on' to force her to leave.

Also, I tried to do this in CASE mode, using the manual view. This also does not work.

Other calculators in the classroom (TI-83) did the integral almost immediately.

My memory is not yet close to being complete.

Is there something I could do or check to solve the problem? Other integrals seem to be more or less fine.

Thank you!

When you do digital integrals, some of them may take some time. On the 40gs and many other units of HP, the accuracy of the correction is what distinguishes the accuracy of assessment. Try to set the precision of DIFFICULTY 4 in the homescreen of modes and re-evaluate. I suspect that he will return very quickly. That should mean "exact to 4 decimal places.

You can also try to do exactly in the CASE and then to assess the result. In many cases, it may be faster.

Tags: HP Tablets

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