Message Boards Message Boards

GROUPS:

A bug or not in Equation solver?

Posted 7 days ago
160 Views
|
2 Replies
|
1 Total Likes
|
In[6]:= Solve[-3 (y - 2)^(4/5) + 29 == -19, y, Integers]

Out[6]= {{y -> 34}}

There is another root for above equation that is y -> -30. But the software only display one root. Is it a bug?

2 Replies
Posted 7 days ago

You can use Surd to also get the negative real root:

Solve[-3 Surd[(y - 2)^4, 5] + 29 == -19, y]
(* {{y -> -30}, {y -> 34}} *)

As an alternative the equation can be rewritten:

Solve[-3 ((y - 2)^4)^(1/5) + 29 == -19, y, Integers]
(* {{y -> -30}, {y -> 34}} *)
Posted 6 days ago

Thanks for the help.

Reply to this discussion
Community posts can be styled and formatted using the Markdown syntax.
Reply Preview
Attachments
Remove
or Discard

Group Abstract Group Abstract