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I was born to answer lhfs.


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.
May
20
comment Inequality involving conjugate numerator/denominator pairs
Don't worry. Do you know how to solve $(x + 2)(x + 4)(x + 7) < 0$ otherwise, without expanding it into a polynomial?
May
20
comment Inequality involving conjugate numerator/denominator pairs
$(x+2)(x+4)(x+7) < 0$ is another way to say that something is negative. Have you ever used the wavy-curve method?
May
20
comment Inequality involving conjugate numerator/denominator pairs
Corrected it. By the way, you should use the second method.
May
20
revised Inequality involving conjugate numerator/denominator pairs
edited body
May
20
answered Inequality involving conjugate numerator/denominator pairs
May
18
comment Evaluate the limit with Taylor series
Scroll down. chat.stackexchange.com/transcript/13574/2014/4/7
May
18
comment Evaluate the limit with Taylor series
Rob... ${}{}{}$
May
18
revised Graph this function: F(x)=$-2^{|x|+1}$.
added 1 character in body
May
17
comment Absolutet Value Inequality with cases number line
Done! Also included the number line.
May
17
revised Absolutet Value Inequality with cases number line
added 292 characters in body
May
17
reviewed Reject Proof of this inequality
May
17
comment Absolutet Value Inequality with cases number line
A number line wouldn't be much of a solution. It can only be used to represent numbers. Depending on different contexts, it's used in different ways. Here, the question might be asking you to use a number line for representing the solution of this inequality.
May
17
comment Absolutet Value Inequality with cases number line
A number? I'm not sure if I perfectly understand your query. Do you mean a number line?
May
17
answered Absolutet Value Inequality with cases number line