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location New York, NY
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Apr
9
answered Find the slope of a tangent to a curve when $x = 4$
Apr
9
revised Find the slope of a tangent to a curve when $x = 4$
added 4 characters in body; edited title
Apr
9
answered Question regarding inequalities and probability.
Apr
9
comment Need to check answer-Factoring out from surds
I think he meant $n^{3/2}$ not $n^3/2$
Apr
9
comment Conditional Probability - Bayes' Theorem
Why not apply the approach from math.stackexchange.com/questions/745646/…, I intentionally did not answer the second question, it is exactly the same, no?
Apr
9
revised Integral versus Riemann's sum
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Apr
9
revised Integral versus Riemann's sum
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Apr
9
comment Probability applied to economics
@ScottGoddard but the problem says that "$30\%$ of the professors who received this material adopted the book", so $(S,A) = 0.3 \times 0.8 = 0.24$!
Apr
9
comment Why does convexity of a function required the following
@user2654176 see the edit, this is equivalent to $f''>0$ (assume $f''$ exists).
Apr
9
revised Why does convexity of a function required the following
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Apr
9
comment Probability applied to economics
@ScottGoddard Looks like you evaluated incorrectly. What numbers did you get for each of the 4 sets, and how did you get them?
Apr
9
comment Why does convexity of a function required the following
@user2654176 I don't understand what you are asking.
Apr
9
comment Limits: $\lim_{x\to0^+}xe^\frac{-1}x$ and $\lim_{x\to0^-}xe^\frac{-1}x$
Can you please exhibit at least some attempt at solving the problem yourself? Then we can comment and give some hints. This is not the "society of people who do your homework for you."
Apr
9
revised Limits: $\lim_{x\to0^+}xe^\frac{-1}x$ and $\lim_{x\to0^-}xe^\frac{-1}x$
added 8 characters in body; edited tags; edited title
Apr
9
answered Why does convexity of a function required the following
Apr
9
revised What's the MLE of $\frac1\lambda$ for $f(x)=\frac1\lambda\exp − \frac x\lambda$?
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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