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Jun
12
asked Multi variable integral : $\int_0^1 \int_\sqrt{y}^1 \sqrt{x^3+1} \, dx \, dy$
Jun
10
asked Formula to estimate sum to nearly correct : $\sum_{n=1}^\infty\frac{(-1)^n}{n^3}$
Jun
8
awarded  Commentator
Jun
8
comment Lagrange's method to find min/max question
Sorry. Can I ask you, when I read on Wiki, constraint is an equation. and when I ask my teacher, my teacher say when constraint is inequality, we use another method.
Jun
8
comment Lagrange's method to find min/max question
can you give me an example, please. My teacher says the thing opposite :( that we can sure that no max for that function (in above example)
Jun
8
asked Lagrange's method to find min/max question
Jun
7
accepted Partial Derivation: $\lim_{(x,y)\to(0,0)}\frac{x^2+\sin^2y}{2x^2+y}$
Jun
7
asked Partial Derivation: $\lim_{(x,y)\to(0,0)}\frac{x^2+\sin^2y}{2x^2+y}$
Jun
4
accepted Sum of two divergence series is always divergence series?
Jun
3
comment Sum of two divergence series is always divergence series?
@Marvis Oh. sorry so much :( I always think two examples is same :(
Jun
3
comment Sum of two divergence series is always divergence series?
Take opposite of series and plus together is too special in my opinion.
Jun
3
comment Sum of two divergence series is always divergence series?
@DavidMitra yes. I have thought your example before, but it's too special.
Jun
3
asked Sum of two divergence series is always divergence series?
May
30
accepted Maple: how to solving composite function
May
28
comment Maple: how to solving composite function
No. I don't think it's just for fun. it's nice. but I don't know your solution compare to first one (above post) will be same performance or not :)
May
28
comment Maple: how to solving composite function
Can you explain a bit at line 3 and 4,please. I know how they work, but I really don't understand why it works right. I'm thinking about your nice solution so much. Thanks :)
May
28
asked Maple: how to solving composite function
May
22
accepted Evaluating $\int_{0}^{1} \sqrt{1+x^2} \text{ dx}$
May
22
accepted Compute lim from Graph
May
22
accepted Min/Max of $f(x,y) = e^{xy}$ where $x^3+y^3=16$