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user153582
  • Member for 10 years
  • Last seen more than 4 years ago
49 votes
Accepted

Is "Linear Algebra Done Right" good for a beginner?

2 votes

I don't understand the definition of an algebra and $\sigma$-algebra

2 votes

Show that there is a smallest closed set $\overline A$ which contains ${A}$

2 votes

Proof involving the sup of a closed and bounded set

2 votes
Accepted

Find the direction in which the function $f(x, y)$ = $x^3y − x^2y^4$ decreases fastest at the point (5, −4).

2 votes
Accepted

How can I prove that for any $n \ge 4$, $2^n \ge n^2$

1 vote

How to Find the Derivatives of $\tan^2(x^4)$ and $\sec^3(x^5)$?

1 vote

How to Completely Simplify the Derivative of $\sqrt{16-x^2}-4\cos^{-1}(x/4)$

1 vote
Accepted

Is the set of all singular $2\times2$ matrices a subspace of $R^3$?

1 vote

Equation of a line tangent to ellipse

1 vote
Accepted

System of Linear Equations. Examples of 5 different solution sets

1 vote
Accepted

Tangent mapping under the local coordinate

1 vote

Proof that $|d(x,y) + d(y,z)| \leq d(x,z)$

1 vote
Accepted

Pigeon Hole Principle(Contrapositive)

1 vote

Show these two polynomials are irreducible over $\mathbb{Q}$

1 vote

Find the critical numbers of $f(x) = 7x^3 + |x|$. Determine critical numbers at which the tangent line is horizontal

1 vote
Accepted

show that $\dfrac{dV}{dt}<0$

1 vote

probability function $f(x)= \frac{c}{3^x}$, x=1,2,3... determine the constant c and find the distribution function.

1 vote

Let $v,w$ be vectors of some vectorial space $V$. If $v=w$, are they said to be equivalent?

1 vote

Writing proofs with modular arithmetic

0 votes

Intuition of equivalent topologies

0 votes

How to find the basis of this eigenspace?

0 votes
Accepted

prove that u(f(t), t) is constant in t

0 votes

At what point is the function $f:\mathbb{R}\rightarrow\mathbb{R}$ continuous?

0 votes

Instantaneous rates of change

0 votes

Find the rate of change of f with respect to t along the curve.

0 votes

linear transformation to determine $T(x_1, x_2)$ for any $ (x_1, x_2)$ in $R^n$

0 votes

The sum of $\sum_{j=1}^{n}{2^{-j}}$

0 votes

Critical points, open and closed interval

0 votes

Show that B is a closed subset of a metric space M