## 2 Badges

13 years, 321 days

## Antiderivatives...

Maple
Hi, This is my 1st try with Antiderivatiives using Maple 12 Student Edition. These statements work fine and the answers are the same as the book. int(15*x^4-cos(x)+5, x); int(8*x^3+Pi*cos(Pi*x), x); but the below doesn't work. Maple just repeats it with the Integral symbol before it and 'dx' after it. by hand the answer is 3x^(5/3)+x^(3/5)+C. int(5*(x^2)^(1/3)+3/(5*(x^2)^(1/5)), x); thanks

## 2nd Derivative problem with Maple 12 Stu...

Maple
hi, if i run the below statements, the last 2 cause Maple 12 Student Edition to chug along for a minute then generate a very long answer, like a page worth. it's like it can't figure out the answer and dumps a bunch of garbage. all i am trying to do is a 2nd derivative. restart; dist := t-> sqrt((-27-(60+23*sin(t))*t/sqrt(2))^2+(-11*t+(60+23*sin(t))*t/sqrt(2))^2); 'dist(t)' = dist(t); Ddist := D(dist); 'Ddist(23/60)' = evalf(Ddist(23/60)); tmax := fsolve((D(Ddist))(t), t = 0 .. 1); 'Ddist(tmax)' = evalf(Ddist(tmax));

## Old Maple MWS vs. new Maple 12 results d...

Maple
hi, i'm using an existing Maple mws that was created by some unknow version of Maple. the Maple text is show below, and the old result is the last line (0.28031703) restart; T := ->(1/8)*sqrt(x^2+225)+(1/3)*sqrt((20-x)^2+625); dT := D(T); solve(dT(x) = 0, x); evalf(%); Sols := %; Xbest := Sols[1]; solve(25/(20-x) = 15./x, x); T(%)-T(Xbest) 0.28031703 when i run in with Maple 12 Student Edition, the result I get is 11.41326364-(1/8)*sqrt(13.51659367[1]^2+225)-(1/3)*sqrt(1025-40*13.51659367[1]+13.51659367[1]^2)

## How do I get get of Complex I when inter...

Maple
i have Maple 12 Student edition. when i do a 5th intergration, and eval at Pi, i get a complex answer. how would i get it to display a rational answer ? h := t-> (1+t^3*cos(t))^(1/5); ((D@@5)(h))(Pi); evalf(%); simplify(%); -.1245723200-0.905070854e-1*I D1 := D(h); D2 := D(D1); D3 := D(D2); D4 := D(D3); D5 := D(D4):fsolve(D5(Pi)); -.1245723200-0.9050708540e-1*I thanks
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