Wolframalpha - how to get value of function in a specific point?

Question

For example , given this function -

$f(x) = x^3-x^2-x-1$

and I want to check it in the point $x=1.6$.

What should I have to write in the command line of wolframalpha in order to get it ?

score 10 · Accepted Answer · answered Apr 01 '13 at 23:08

10

The input

 evaluate x^3-x^2-x-1 at 1.6

seems to work. Here is the link. Here is an image:

answered Apr 01 '13 at 23:08

Zev Chonoles

score 8 · Answer 2 · answered Apr 01 '13 at 23:41

8

Asking politely:

please compute x^3-x^2-x-1 at x=1.6

did the work for me.

enter image description here

answered Apr 01 '13 at 23:41

PML

8

Indeed. I removed the "please" and it did not work :) – Lord Soth Apr 01 '13 at 23:43
6

It's rather charming to see such an insistence on manners. – mikoyan Aug 25 '13 at 09:30

score 3 · Answer 3 · answered Apr 01 '13 at 23:10

3

You could do it like this:

However, you could also do a table like this:

answered Apr 01 '13 at 23:10

Amzoti

score 2 · Answer 4 · answered Apr 01 '13 at 23:08

2

"evaluate x^3-x^2-x-1 at x=1.6" works for me.

answered Apr 01 '13 at 23:08

Josh B.

4 Answers4