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Nov
4
comment Is $\tan x$ continuous at $0$? If so, how can I prove using $\epsilon$ and $\delta$?
What definition of the tangent function are you using?
Nov
4
comment How do I solve $3^{\ln{2}} \times x^{\ln x + \ln 6 + 1} = \frac{3e^2}{4}$
Then use the quadratic formula...
Nov
4
comment Evaluating an integral $\int_{-2}^12(x-4)^2dx$
Who told you that this isn't right?!?
Nov
4
answered Evaluating an integral $\int_{-2}^12(x-4)^2dx$
Nov
4
comment Evaluating an integral $\int_{-2}^12(x-4)^2dx$
What antiderivative did you find for $2(x-4)^2$?
Nov
4
comment Confused with Apples and Mangoes.
You should be using the ELIMINATION METHOD to get one equation in (just) one variable. Then after solving that (say, for A), you can substitute back into an original equation and find the other variable.
Nov
3
comment Is there a more elegant way to prove this inequality?
@SimonS - that should be an answer!
Nov
3
comment Define a relation and find its equivalence classes.
You might want to elaborate slightly on why/how $b|xy$.
Nov
3
comment 2x2 matrices and groups under multiplication
The formal way to prove this is to start off with "Let A, B be in G. That means, by definition, that detA is [...] and detB is [...]. Then their product AB is also in G because its determinant is..."
Nov
3
comment 2x2 matrices and groups under multiplication
You cannot use just one example to prove that a property holds for all examples!
Nov
3
comment Confused with Apples and Mangoes.
What two equations are you using?
Nov
3
comment Confused with Apples and Mangoes.
The actual numbers make little difference. You need to know how to solve a system of equations. Here is one site: purplemath.com/modules/systlin5.htm
Nov
3
answered Confused with Apples and Mangoes.
Nov
2
comment Finding the equivalence class of a relation |a| = |b|
Then you'll have $S_i$ is the set of complex numbers such that $\sqrt{x^2 + y^2} = i$
Nov
2
comment Finding the equivalence class of a relation |a| = |b|
For each non-negative real number, you have an equivalence class. I would call these classes something like $S_i$, where $i \in \mathbb R$.
Nov
2
comment Finding the equivalence class of a relation |a| = |b|
@Overclock, you're making progress. Yes, you should be using $| -3 + 4i|$, but write it as $\sqrt{(-3)^2 + 4^2)}$ and compare this to the distance formula in the xy plane.
Nov
2
comment Finding the equivalence class of a relation |a| = |b|
Also, at this level, you should probably justify each property by citing the corresponding property of equality.
Nov
2
answered Finding the equivalence class of a relation |a| = |b|
Oct
31
answered How to Differentiate $x^7(7x+5)^6$
Oct
31
comment How to Differentiate $x^7(7x+5)^6$
Why include "HINT"?