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bio website linkedin.com/in/gt6989b
location New York, NY
age 35
visits member for 2 years, 7 months
seen Apr 14 at 22:52

Apr
9
comment What's the MLE of $\frac1\lambda$ for $f(x)=\frac1\lambda\exp − \frac x\lambda$?
Please clarify the equations in the text, they way it is phrased makes no sense to me.
Apr
9
answered Integrate the following
Apr
9
comment Suppose $A, B$, and C are sets. Prove that $C\subset A\Delta B \Leftrightarrow C \subset A \cup B$ and $A \cap B \cap C = \emptyset $
@GabeCarr the phrase "the statement A ⋂ B ⋂ C must be an empty or null set" is wrong: $A \cap B \cap C$ is not a statement, and statements cannot be empty or null sets. What is meant to say is that the set $A \cap B \cap C$ is empty, i.e. $A \cap B \cap C = \emptyset$
Apr
9
answered Matrix Transformation - Using matrix multiplication
Apr
9
comment What is the shortest way to write the number $1234567890$?
@DavisYoshida how do you denote $55_{64}$ by one digit -- rubik's notation is only good for base 36 (10 digits + 26 letters)?
Apr
9
answered What is the shortest way to write the number $1234567890$?
Apr
9
comment What is the shortest way to write the number $1234567890$?
One approach is to find some relatively short base, and it shrinks fast, e.g. it is $499602D2_{16}$ (same 10 digits).
Apr
9
comment Evaluate the limit
@rubik Missed the all real numbers part, thank you
Apr
9
comment Suppose $A, B$, and C are sets. Prove that $C\subset A\Delta B \Leftrightarrow C \subset A \cup B$ and $A \cap B \cap C = \emptyset $
@GabeCarr not sure what you mean. The event $z \in X - Y = X \cap \bar{Y}$ happens if and only if $z \in X$ and $z \not \in Y$.
Apr
9
comment Probability of eight dice showing sum of 9, 10 or 11
Looks right to me
Apr
9
comment Evaluate the limit
Why cannot you have $$\psi(x) = 2 + \frac{1}{x} \to 2$$ instead? By this example it can converge to any limit...
Apr
9
comment Evaluate the limit
I don't understand what the second condition adds: since $t^2 < (t+1)^2$, we already know that $$\psi(t^2) > \psi(t^2+1) > \ldots > \psi\left((t+1)^2\right)$$
Apr
9
answered Changing limits of integration
Apr
9
answered Suppose $A, B$, and C are sets. Prove that $C\subset A\Delta B \Leftrightarrow C \subset A \cup B$ and $A \cap B \cap C = \emptyset $
Apr
9
comment How to find maximum/minimum of $y=\frac{x(x^2-x+2)}{x^2-9}$?
@Cherufe both min and max are unbounded
Apr
9
revised Compute: as $\displaystyle{\lim_{n\to \infty} \int_0^\pi \sin^n x dx}$
added 54 characters in body; edited title
Apr
9
comment Line integral segment of parabola
@user131040 please be more specific, i am not telling you the answer. But will comment on what you are doing exactly if you tell me the steps you took. What are you using for $x,y$ and which integral are you taking?
Apr
8
answered What is this problem stating? And how to prove this?
Apr
8
comment Line integral segment of parabola
@user131040 i thought the text specified this pretty clearly
Apr
8
comment Line integral segment of parabola
@user131040 You must express them in terms of $t$, as we defined when we parameterized the curve.