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# The Summing template on the C Key how does it work?

HP Prime G2

I tried using The Sum that E for lists with i=0 and infinity sign above and the expression after the = sign.

I put the template on my Home page and added all the parts it did not work.

Does anyone know how to use it

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## The Summing template on the C Key how does it work?

Hi!, @HeyJoeJoe :

Check the configuration in your calculator. The result with Wolfran Alpha, is ...

Kind Regards !.
Have a nice day !.
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## The Summing template on the C Key how does it work?

We did the i for i=10, thanks but the calculator still doesnt want to except that Series Expansion. It gets stuck on fractions and parts.

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## The Summing template on the C Key how does it work?

Hi!, HeyJoeJoe :

Try, with ... sin(PI/2)=Sum(((-1)^i*X^(2*i+1))/(2*i+1)!,i,10,infinite) --> X=~ 8.73894

Kind Regards !.
Have a nice day !.
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## The Summing template on the C Key how does it work?

Thank you.

your  equation first and second replacing with n as the variable

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## The Summing template on the C Key how does it work?

Hi!, @HeyJoeJoe :

The result in Exact Mode, of you ultimate equation is, with Wolfram Alpha ...

sin(pi/2)=Sum(((-1)^n*x^2*n+1)/(2*n+1)!),n,10,infinite) =~ -2.32518 x10^8 = complex infinite

In HP PRIME calculator ...

Kind Regards !.
Have a nice day !.