Question

Proving $A \cup B \cup C = (A-B)\cup(B-C)\cup(C-A)\cup(A \cap B \cap C)$ - not sure why this reasoning is failing.

score 277 · Answer 1 · 2018-06-07 13:36:40

277

Views

Proving $A \cup B \cup C = (A-B)\cup(B-C)\cup(C-A)\cup(A \cap B \cap C)$ - not sure why this reasoning is failing.

Published on 07 Jun 2018 - 13:36

score 85 · Answer 2 · 2018-06-07 16:50:56

85

Views

Fundamental Theorem of Calculus $f(x) = -\int_1^{2/x} 2t^22^2dt$

Published on 07 Jun 2018 - 16:50

score 31 · Answer 3 · 2026-03-29 07:30:33

31

Views

Proof of existence of the point

Published on 29 Mar 2026 - 7:30

score 570 · Answer 4 · 2018-06-07 19:10:48

570

Views

Is this $\epsilon$-$\delta$ proof of $\lim_{x\to p} \ln(x) = \ln(p)$ correct?

Published on 07 Jun 2018 - 19:10

score 409 · Answer 5 · 2026-03-27 10:09:15

409

Views

With square matrices, prove by mathematical induction that $(ABA^{-1})^k=AB^kA^{-1}$

Published on 27 Mar 2026 - 10:09

score 1.3k · Answer 6 · 2018-06-07 22:07:02

1.3k

Views

If S is a non-empty finite closed subset under multiplication of G, prove that S is a subgroup of G

Published on 07 Jun 2018 - 22:07

score 403 · Answer 7 · 2026-03-25 15:52:35

403

Views

Axiom of Choice implies Hausdorff Maximality Principle

Published on 25 Mar 2026 - 15:52

score 84 · Answer 8 · 2026-03-25 21:01:17

84

Views

Proof by induction $3^{2n}-2^n$ is multiply of 7

Published on 25 Mar 2026 - 21:01

score 71 · Answer 9 · 2026-03-27 05:36:32

71

Views

Proof-verification: A level set not being a regular submanifold

Published on 27 Mar 2026 - 5:36

score 91 · Answer 10 · 2026-03-25 23:36:21

91

Views

set theory - prove that $S \subseteq \mathbb N^{\mathbb N} $ is Countable set

Published on 25 Mar 2026 - 23:36

score 99 · Answer 11 · 2018-06-08 16:40:34

99

Views

Prob. 21, Exercises 8.9, in Apostol's CALCULUS vol. II: If the directional derivative of a scalar field vanishes . . .

Published on 08 Jun 2018 - 16:40

score 70 · Answer 12 · 2018-06-08 18:17:25

70

Views

Proof Verification: Abstract Algebra Groups

Published on 08 Jun 2018 - 18:17

score 62 · Answer 13 · 2018-06-08 21:22:03

62

Views

Showing that the sequence $\{f'_{n}(x)\}$ converges pointwise but not uniformly on $(-1,1)$.

Published on 08 Jun 2018 - 21:22

score 40 · Answer 14 · 2018-06-09 01:23:35

40

Views

Why $B_\epsilon(d)\not\subset G'\not\rightarrow B_\epsilon(d)\subset G'^c$?

Published on 09 Jun 2018 - 1:23

score 80 · Answer 15 · 2018-06-09 06:29:17

80

Views

Prove that $\frac{dy}{dx}+\sec^2(\frac{\pi}{4}-x)=0$

Published on 09 Jun 2018 - 6:29

List Question

Proving $A \cup B \cup C = (A-B)\cup(B-C)\cup(C-A)\cup(A \cap B \cap C)$ - not sure why this reasoning is failing.

Fundamental Theorem of Calculus $f(x) = -\int_1^{2/x} 2t^22^2dt$

Proof of existence of the point

Is this $\epsilon$-$\delta$ proof of $\lim_{x\to p} \ln(x) = \ln(p)$ correct?

With square matrices, prove by mathematical induction that $(ABA^{-1})^k=AB^kA^{-1}$

If S is a non-empty finite closed subset under multiplication of G, prove that S is a subgroup of G

Axiom of Choice implies Hausdorff Maximality Principle

Proof by induction $3^{2n}-2^n$ is multiply of 7

Proof-verification: A level set not being a regular submanifold

set theory - prove that $S \subseteq \mathbb N^{\mathbb N} $ is Countable set

Prob. 21, Exercises 8.9, in Apostol's CALCULUS vol. II: If the directional derivative of a scalar field vanishes . . .

Proof Verification: Abstract Algebra Groups

Showing that the sequence $\{f'_{n}(x)\}$ converges pointwise but not uniformly on $(-1,1)$.

Why $B_\epsilon(d)\not\subset G'\not\rightarrow B_\epsilon(d)\subset G'^c$?

Prove that $\frac{dy}{dx}+\sec^2(\frac{\pi}{4}-x)=0$

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