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Apr
4
comment Equations of the tangent lines of $y=x^4$ at the point $(2,0)$?
@DanielEscudero Yes! There are lines in both directions. That should explain the lines.
Apr
4
comment Equations of the tangent lines of $y=x^4$ at the point $(2,0)$?
@DanielEscudero Yes. I also think it's weird to ask about lines, In my mind, I also think it's only one line. But he used the plural retas in here.
Apr
4
comment Equations of the tangent lines of $y=x^4$ at the point $(2,0)$?
@DanielEscudero Oh, I get it. What is being asked is the equation of the line that passes through $(2,0)$ and touches the curve. I guess it's this.
Apr
4
asked Equations of the tangent lines of $y=x^4$ at the point $(2,0)$?
Apr
3
comment What is the meaning of division for quasigroups in here?
@vadim123 Oh yes. Sorry. I was too lazy that I didn't even think about googling quasigroups. I blame the lack of coffee.
Apr
3
asked What is the meaning of division for quasigroups in here?
Apr
3
asked Determine the equation of the tangent line to $P=(x_0,x_0^4)$ in $y=x^4$.
Apr
2
accepted How to show that $\frac{-1}{x^2}=0$ has no solutions?
Apr
2
comment How to show that $\frac{-1}{x^2}=0$ has no solutions?
Good. But multiplying both sides by $x^2$ is the only possible operation to solve that, isn't it?
Apr
2
asked How to show that $\frac{-1}{x^2}=0$ has no solutions?
Apr
2
accepted Are there two meanings to induction?
Apr
2
comment Are there two meanings to induction?
Very good. Your answer is the first thing that made the proof tick in my mind. You've made all steps really clear, I am satisfied. Thanks a lot!
Apr
2
asked A question on the proof of commutativity of the sum of natural numbers?
Apr
1
comment Are there two meanings to induction?
I don't know, but I feel that part a little artificial. But perhaps it's only my own stupidity.
Apr
1
comment Are there two meanings to induction?
Exactly! But the hypothesis is made out of nowhere. It is not a consequence of what was written before. Or if it is, then I really do not see how that could be.
Apr
1
revised Are there two meanings to induction?
added 3 characters in body
Apr
1
asked Are there two meanings to induction?
Mar
26
comment Identify the subset of the plane composed by $R\cos \theta=5$ by means of polar coordinates $R,\theta$?
@N.F.Taussig I figured it now! Thanks.
Mar
26
answered Identify the subset of the plane composed by $R\cos \theta=5$ by means of polar coordinates $R,\theta$?
Mar
25
comment Identify the subset of the plane composed by $R\cos \theta=5$ by means of polar coordinates $R,\theta$?
I don't know, I'm a bit confused with the book instructions. It says that the polar coordinates are $(R, \theta)$ and the cartesian coordinates of this point are $(R \cos \theta, R \sin \theta)$. I'm a bit confused.