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visits member for 2 years, 3 months
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I was born to answer lhfs.


2d
answered How do I factor $z^4+2z^3+4z^2+2z+3$?
Sep
17
comment You drive in a straight line at 24.0m/s for 10.0 miles, then at 34.0m/s for another 10.0 miles. Calculate the avergae speed.(İt is less than 29.0m/s)
The total distance is 20 miles. Calculate the total time from the information you are given. Divide them.
Aug
31
comment Find the sum, if exists $\sum\limits_{n=1}^{\infty} \frac{(2n)!}{2^{2n}(n!)^2(n+1)}$
I'd just stick to Shubham's method.
Aug
31
revised Finding the value of $\frac{\cos^4\beta}{\cos^2\alpha} + \frac{\sin^4\beta}{\sin^2\alpha}$.
added 35 characters in body
Aug
31
revised Finding the value of $\frac{\cos^4\beta}{\cos^2\alpha} + \frac{\sin^4\beta}{\sin^2\alpha}$.
added clarity
Aug
31
revised Finding the value of $\frac{\cos^4\beta}{\cos^2\alpha} + \frac{\sin^4\beta}{\sin^2\alpha}$.
edited title
Aug
31
answered Finding the value of $\frac{\cos^4\beta}{\cos^2\alpha} + \frac{\sin^4\beta}{\sin^2\alpha}$.
Aug
30
revised Adding $2$ absolute values together: $|x+2| + |x-3| =5.$
deleted 3 characters in body
Aug
30
answered Adding $2$ absolute values together: $|x+2| + |x-3| =5.$
Aug
2
comment What are some good questions for this trick, if $\frac{a}{b}=\frac{c}{d}=\frac{e}{f}=\dots=\alpha$ then $\alpha=\frac{a+c+e+…}{b+d+f+…}$?
Do you happen to have a copy of Higher Algebra by Hall and Knight? It contains quite a few of these in the first chapter.
Jul
2
awarded  Curious
Jun
26
comment Trigonometry / Finding the exact value
Do you understand that that the cosine function obtains the same value every $2\pi$?
Jun
24
answered Problem of quadratic equation
Jun
24
awarded  Yearling
Jun
20
awarded  Nice Answer
Jun
5
comment How do you solve this using only given values, logarithm rules and no calculator?
You can introduce $\log(2)$ easily. $\log(4) = 2\log(2)= 0.6021 $.
Jun
3
revised How do I prove $\frac{ \sqrt{x+h}-\sqrt{x} }{ h}=\frac{1}{\sqrt{x+h}+\sqrt{x}}$?
edited tags
May
22
comment Inequality involving conjugate numerator/denominator pairs
Are you there? Chat is up now.
May
22
comment Inequality involving conjugate numerator/denominator pairs
I would explain the full process to you, but the chat is offline. You can cancel the $x^3$ as a start.
May
20
comment Inequality involving conjugate numerator/denominator pairs
Yes, that's just the wavy-curve method. It's just that you put alternate + and - between the intervals.