Reputation:
I was running diff(abs(2*x + 5), x)
, maple gives me an answer of 2*abs(1, 2*x + 5)
I actually dont know what that means. But I know the answer is (4*x + 10)/abs(2*x + 5)
. How could I transform the answer from 2*abs(1, 2*x + 5)
to (4*x + 10)/abs(2*x + 5)
Thanks for the help.
Upvotes: 2
Views: 87
Reputation: 7246
diff(abs(2*x + 5), x) assuming x::real;
/ 5\
2 signum|x + -|
\ 2/
ans1 := normal(convert(%,abs));
2 x + 5
ans1 := -------
| 5|
|x + -|
| 2|
ans2 := (4*x + 10)/abs(2*x + 5);
4 x + 10
ans2 := ---------
|2 x + 5|
combine(normal(convert(ans1-ans2, signum)));
0
The meaning of abs(1,x)
is described on the Help page for the abs
command.
Upvotes: 2