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 Yearling
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20h
asked Show that the expansion of $(1+x)^n$ by Binomial Theorem is convergent when $x<1$
May
24
awarded  Yearling
May
24
revised Math about Geometric series
latex added
May
24
comment Math about Geometric series
If we consider $\frac{a}{r^6}, \frac{a}{r^2},ar^2,ar^6,$, then we get $57r^{12}-26r^8+31r^4-26=0$, which I can not solve ; If we consider $\frac{a}{r^3}, \frac{a}{r},ar,ar^3,$, then we get $57r^{8}-26r^2+31r^4-26=0$, which I can not solve ;
May
23
accepted Why $x=u+v$ substitution works?
May
23
asked Why $x=u+v$ substitution works?
May
21
accepted Use quadratic formula to find upper and lower limits of an expression
May
21
asked Use quadratic formula to find upper and lower limits of an expression
May
13
comment series $1+\frac{1}{2}+\frac{1}{3}+\frac{1}{4}+\frac{1}{5}+…$
@John, thank you John :)
May
13
comment series $1+\frac{1}{2}+\frac{1}{3}+\frac{1}{4}+\frac{1}{5}+…$
@MarkBennet, thank you mark, I get your response :)
May
13
asked series $1+\frac{1}{2}+\frac{1}{3}+\frac{1}{4}+\frac{1}{5}+…$
May
11
comment Ratio question with 3 eqn and 3 unknowns
how to find value of k?
May
11
asked Ratio question with 3 eqn and 3 unknowns
May
10
comment What is rational integral function
@GerryMyerson, thankx
May
10
asked What is rational integral function
May
4
comment Explaining intersections to a 6th grader
If school dress requires you to wear black shoes with white socks and student 1,2,3,4,5 wore black shoes but non of them wore white socks, how many students are in complete uniform?
May
4
comment What is a good book for reviewing high school math, and preparing for university?
related to:math.stackexchange.com/questions/23740/…
May
1
comment $\frac{1}{x}$ series question help
is the edit correct?
May
1
revised $\frac{1}{x}$ series question help
latex added
Apr
29
awarded  Popular Question