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Sep
26
comment Show that $ x\mapsto e^x$ is continuous.
See en.wikipedia.org/wiki/…
Sep
26
comment Is -2 is a root of the equation : $\sqrt {x^2 - 8} = \sqrt {3x + 2}$?
you are saying that sqrt(-4) = 2i. This is questionable, I have never seen such a definition.
Sep
26
comment Is -2 is a root of the equation : $\sqrt {x^2 - 8} = \sqrt {3x + 2}$?
Anyway the square root is not defined.
Sep
26
answered Set question, relations, equivalence classes
Sep
26
revised Set question, relations, equivalence classes
deleted 1 character in body
Sep
26
answered Is -2 is a root of the equation : $\sqrt {x^2 - 8} = \sqrt {3x + 2}$?
Sep
26
revised Is -2 is a root of the equation : $\sqrt {x^2 - 8} = \sqrt {3x + 2}$?
deleted 12 characters in body
Sep
25
revised Show that $ x\mapsto e^x$ is continuous.
added 26 characters in body
Sep
25
revised Show that $ x\mapsto e^x$ is continuous.
added 59 characters in body
Sep
25
comment Show that $ x\mapsto e^x$ is continuous.
right... I add it!
Sep
25
revised Solve the following equation. Check all proposed solutions.
edited tags
Sep
25
comment Can you fit every single permutation of a triangle inside a circle with all three points touching the edges of the circle
The statement is not clear. What are the permutations of a triangle? The circle is fixed?
Sep
25
revised Show that $ x\mapsto e^x$ is continuous.
deleted 47 characters in body
Sep
25
awarded  Nice Answer
Sep
25
answered Show that $ x\mapsto e^x$ is continuous.
Sep
25
answered Modulo of division of modulo
Sep
25
revised Is supremum over a compact domain of separately continuous function continuous?
added 95 characters in body
Sep
25
answered Is supremum over a compact domain of separately continuous function continuous?
Sep
25
comment Determinant always equal to zero?
what is $C_i(B)$?
Sep
25
comment Determinant always equal to zero?
@Thomas: see the added part.