been having trouble getting results in CAS system

01222018, 08:02 AM
Post: #3




RE: been having trouble getting results in CAS system
Parisse,
Ah, I didn't realize, we already have an arcLen() function. So, I can use arcLen(y(x),x,a,b) Of course, you are right....it's not easy to calculate using this format....is the same math internally. So, if I set z:=1, n:=3, a:=0, b:=1 y = (1x^3)^(1/3) dy/dx = x^2/((1x^3)^(1/3))^2 (1+(dy/dx)^2)^(1/2) = ((x^2/((1x^3)^(1/3))^2)^2+1)^(1/2) So, now, we can calculate int((1+(dy/dx)^2)^(1/2),x,0,1) like this, and it'll give a value of 1. However int(((x^2/((1x^3)^(1/3))^2)^2+1)^(1/2),x,0,1) hangs for a minute and gives an answer of an integral...i.e. doesn't get solved. Why does it work with dy/dx but not with the expanded form???? Thanks Donald 

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Messages In This Thread 
been having trouble getting results in CAS system  webmasterpdx  01212018, 09:19 AM
RE: been having trouble getting results in CAS system  parisse  01222018, 07:03 AM
RE: been having trouble getting results in CAS system  webmasterpdx  01222018 08:02 AM
RE: been having trouble getting results in CAS system  webmasterpdx  01222018, 09:39 AM
RE: been having trouble getting results in CAS system  parisse  01222018, 08:04 PM
RE: been having trouble getting results in CAS system  webmasterpdx  01242018, 09:02 AM
RE: been having trouble getting results in CAS system  parisse  01242018, 03:22 PM

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