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Javier's user avatar
Javier's user avatar
Javier
  • Member for 13 years, 7 months
  • Last seen this week
  • Buenos Aires, Argentina
31 votes

How can I introduce complex numbers to precalculus students?

19 votes
Accepted

What is $\ln 0$?

12 votes
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Checking whether a polynomial of high degree is bijective or not.

12 votes
Accepted

Fourier series for $\sin x$ is zero?

9 votes
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Need help computing $(f \circ g)(x)$

8 votes
Accepted

Is it 'more rigorous' to perform definite integrations, rather than indefinite integration while solving ODEs?

7 votes

Proof for parallelogram law of vector addition

7 votes

How to show $|\sin(x+iy)|^2=\sin^2x+\sinh^2y$

7 votes
Accepted

Suppose that $f$ is a real valued function such that its second derivative is discontinuous.Can you give some example?

7 votes

Mathematical Induction: how do we know what applies to one thing also applies to another?

6 votes

Doubt on rational and real numbers

6 votes
Accepted

Integration by parts: $\int xe^{-x}dx$

6 votes

Simultaneous equation other possibilities but how? ($14x - 5y + 14 = 179, \ -14x + 5y + 5 = -160$)

5 votes

Are parallel vectors always scalar multiple of each others?

5 votes
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Prove not a violation of Stokes theorem

5 votes
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Solving $\int\sqrt{1+(-2ax+b)^2}\;dx$

4 votes

Solving an equation of real numbers

4 votes
Accepted

Show that $f$($\mathbb{R}$) =($-1$,$1$).

4 votes
Accepted

About vector addition

4 votes
Accepted

Wolfram double solution to $\int{x \cdot \sin^2(x) dx}$

4 votes
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Vector by integral, notation convention or mistake?

4 votes
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Problem with differentiation as a concept.

4 votes

How to calculate $\overline{\cos \phi}$

4 votes

Where should the exponent be written in numbers with units of measurement?

3 votes
Accepted

Using polar form to prove $|z| = 1 \implies \text{Re}\left(\frac{1-z}{1+z}\right) = 0$

3 votes
Accepted

Is the suggested answer in the book wrong? (sign diagram)

3 votes

Basic set questions

3 votes
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The substitution rule and differentials

3 votes
Accepted

Can someone show me what to do with these Fund. Theorem Of Calc problems?

3 votes
Accepted

Prove $\forall K > 0: \lim_{n\rightarrow\infty} \sqrt[n]{K} = 1$