masac's profile - activity

Thank you. Domain/ Range I try to do the same operations in Sage.

How do i find the domain and range in Sage Math of a function:

f(x) = x/(x^2-1)
g(x) = e^(-x^2) ?

I tried:

sage: a=range(7000,8000)
sage: print[a if a%7==0]
  File "<ipython-input-30-590163f2a51e>", line 1
print[a if a%Integer(7)==Integer(0)]
                                   ^
 SyntaxError: invalid syntax

I find a solution:

print [a for a in [7000..7999] if a%7==0]

Thank you for support.

Thank you for edit.

To find numbers of the form 7aaa that are multiples of 7, I use:

sage:print [a for a in [0..9] if (7000+111*a)%7==0]
[0, 7]

I do not know how to write for 7|7abc.

Thanks.