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visits member for 2 years, 11 months
seen Jul 9 at 7:13

please delete me


Jun
27
comment What do I not understand about one-to-one functions?
OHH! I think I get it know, it's misleading because most people just think of a normal function for every f(x) there is a unique y, but it should actually be that plus doing a "horizontal line" test? So, while x^2 is a function, it is not one-to-one, because it fails the horizontal line test. Whereas x^3 is?
Jun
27
comment What do I not understand about one-to-one functions?
I'm still a little bit confused, so if I am understanding, "thought incorrectly ... f(x) can only have one value", $f(x_1)$ can give multiple values, but $f(x_2)$ must give different values than $f(x_1)$ (given $x_1 \neq x_2$)? But one-to-one, does not imply that given one $x$, $f(x)$ gives one output?
Jun
27
comment What do I not understand about one-to-one functions?
Whoa, so an injective function is not necessarily a function, in terms of function vs relation? That is misleading. My high school terminology deceives me.
Jun
27
revised What do I not understand about one-to-one functions?
added 1 character in body
Jun
27
comment What do I not understand about one-to-one functions?
@PeterFranek: How so? I am not really sure what you want cleaning up on?
Jun
27
asked What do I not understand about one-to-one functions?
Jun
12
suggested suggested edit on Calculus optimization quick question
Jun
11
answered How do I solve the following absolute value equation?
Jun
3
comment Was my reasoning correct for this?
Ok, this is what I was looking for! Thank you so much!
Jun
3
accepted Was my reasoning correct for this?
Jun
2
comment Was my reasoning correct for this?
@chenbai: Yes, that is my question. Thank you, but do you have a particular reason why I can't do what I did? Like a counter example or something that illustrates the point? Thanks.
Jun
2
comment Was my reasoning correct for this?
I'm sorry, but I don't understand your comment.
Jun
1
asked Was my reasoning correct for this?
May
22
revised How to prove $\dfrac{1+\sin{6^\circ}+\cos{12^\circ}}{\cos{6^\circ}+\sin{12^\circ}}=\sqrt{3}$
Changed ^0 to ^\circ
May
22
suggested suggested edit on How to prove $\dfrac{1+\sin{6^\circ}+\cos{12^\circ}}{\cos{6^\circ}+\sin{12^\circ}}=\sqrt{3}$
May
15
comment Beautiful Indefinite Integrals.
I believe this should be a community wiki though...
May
15
comment Beautiful Indefinite Integrals.
@Kaster: The graph is pretty though... :)
May
15
suggested suggested edit on Properties of Integers
May
14
revised Solving the integral $\int_{0}^{\infty} \frac{\sin{x}}{x^2+1} dx$
Added latex.
May
14
suggested suggested edit on Solving the integral $\int_{0}^{\infty} \frac{\sin{x}}{x^2+1} dx$