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Sep
22
asked Solving $\lim _{x\to 1}\left(\frac{1-\sqrt[3]{4-3x}}{x-1}\right)$
Sep
22
accepted Solving $\lim_{x \to 4}\frac{3-\sqrt{5+x}}{1-\sqrt{5-x}}$ without L'Hopital.
Sep
22
comment Solving $\lim_{x \to 4}\frac{3-\sqrt{5+x}}{1-\sqrt{5-x}}$ without L'Hopital.
I can see why you picked $(x-4)$, but it's not clear to me why did you put a minus before $(3-\sqrt{5+x})$ and before $(1+\sqrt{5-x})$ (I'm not even sure if that's valid). Could you elaborate on your procedure?
Sep
22
revised Solving $\lim_{x \to 4}\frac{3-\sqrt{5+x}}{1-\sqrt{5-x}}$ without L'Hopital.
added 71 characters in body
Sep
22
comment Solving $\lim_{x \to 4}\frac{3-\sqrt{5+x}}{1-\sqrt{5-x}}$ without L'Hopital.
@AndréNicolas Oh, that never occurred to me. For some reason I thought I could do that only once. Thanks, I will try that.
Sep
22
asked Solving $\lim_{x \to 4}\frac{3-\sqrt{5+x}}{1-\sqrt{5-x}}$ without L'Hopital.
Sep
17
awarded  Popular Question
Sep
14
asked Evaluating $\lim _{x\to 1}\left(\frac{\sqrt[3]{x}-1}{2\sqrt{x}-2}\right)$
Aug
20
awarded  Autobiographer
Aug
10
accepted Getting the quadratic function given the vertex and one point.
Aug
10
comment Getting the quadratic function given the vertex and one point.
Excuse me, I'm not very familiar with the concept of derivatives yet. Of course, if I ignore the concept and solve the equations I will get the expected answer, but I'm not sure what you meant by $f'(x) = 2ax+b$
Aug
10
asked Getting the quadratic function given the vertex and one point.
Jul
24
awarded  Popular Question
Jul
13
accepted Finding the acute angle between the planes $x-3y+2z=14$ and $-x+y+z=10$
Jul
13
comment Finding the acute angle between the planes $x-3y+2z=14$ and $-x+y+z=10$
What do you think about @Timbuc's comment? About $180 - 107$?
Jul
13
accepted Having a plane equation equaled to zero for calculating its angle with another plane
Jul
13
asked Finding the acute angle between the planes $x-3y+2z=14$ and $-x+y+z=10$
Jul
13
accepted The intersection line between $2x-5y+z=0$ and $y=0$
Jul
13
asked Having a plane equation equaled to zero for calculating its angle with another plane
Jul
13
asked The intersection line between $2x-5y+z=0$ and $y=0$