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+--- Thread: integral in solve (/thread-3701.html)
integral in solve - lrdheat - 04-23-2015 07:32 PM
I need a refresher for this solve question on Prime (asked in not quite HP for this problem on my WP 34S). I want to solve (integral x^2 from 0 to x)=10.
My CASIO 9860gii solve app is straight forward and quickly comes up with ~3.107.
I know that this problem is easily accomplished on the Prime, but I can't remember how.
RE: integral in solve - DrD - 04-23-2015 08:09 PM
Something like:
solve((int(x^2,x,0,x)) = 10,x); // Exact checked in CAS settings
-or-
solve((∫(x^2,x,0,x)) = 10,x);
Seems to work ok.
RE: integral in solve - lrdheat - 04-23-2015 08:33 PM
It does work, and is easy!
How can I do this on the solve app?
RE: integral in solve - lrdheat - 04-26-2015 08:43 PM
DrD...your example worked for the problem above, but doesn't work for solving (integral x^3-2*x^2+sqrt(13*x)dx from 0 to x)=10 (answer is ~2.61)
How do I do this in CAS, and are things different in home?
RE: integral in solve - parisse - 04-27-2015 01:11 PM
solve(int(x^3-2*x^2+sqrt(13*x),x,0,t)=10,t)
Perhaps you had a problem because you are using the same x for two different meanings.