Question

The sum of a number and its reciprocal is 5 (1/5) . Find the number.

score 254 · Answer 1 · 2026-04-16 08:34:29

254

Views

The sum of a number and its reciprocal is 5 (1/5) . Find the number.

Published on 16 Apr 2026 - 8:34

score 231 · Answer 2 · 2026-04-13 21:15:34

231

Views

A rectangular pig pen is built against an existing brick fence. $24$ m of fencing was used to enclose $70$ m$^2$. Find the dimensions of the pen

Published on 13 Apr 2026 - 21:15

score 41 · Answer 3 · 2026-04-10 07:13:20

41

Views

Multiple steps of branching probabilities

Published on 10 Apr 2026 - 7:13

score 94 · Answer 4 · 2026-04-14 11:08:39

94

Views

Finding $k$ such that a modulus equation has one root

Published on 14 Apr 2026 - 11:08

score 64 · Answer 5 · 2026-04-17 05:38:43

64

Views

Sketch the set $A\cap B$ in the Argand plane, where $A=\{z:|\frac{z+1}{z-1}|\leq 1\}$ and $B=\{z:|z|-\operatorname{Re}z\leq 1\}$

Published on 17 Apr 2026 - 5:38

score 526 · Answer 6 · 2026-04-16 04:07:09

526

Views

Does every positive, decreasing, real sequence whose series converges have a corresponding convex sequence greater than it whose series converges?

Published on 16 Apr 2026 - 4:07

score 64 · Answer 7 · 2026-04-12 08:29:16

64

Views

Do i have to add an auxiliary variable when adding a new equality constraint at a LP?

Published on 12 Apr 2026 - 8:29

score 363 · Answer 8 · 2026-04-13 17:39:49

363

Views

How can I learn Undergraduate Mathematics by self-study as my college lectures are not clear enough?

Published on 13 Apr 2026 - 17:39

score 54 · Answer 9 · 2026-04-14 11:23:39

54

Views

Schaum's outlines general topology problem $38$

Published on 14 Apr 2026 - 11:23

score 60 · Answer 10 · 2026-04-13 17:35:55

60

Views

Four very closely related questions on "crossing the border" between convergent/divergent positive real series.

Published on 13 Apr 2026 - 17:35

score 39 · Answer 11 · 2026-04-16 02:36:11

Find positive numbers $n$ and $a_1, \dots, a_n$ such that $a_1 + \dots + a_n = 1000$ and $a_1a_2 \cdots a_n$ is as large as possible.

score 122 · Answer 12 · 2026-04-15 04:37:43

122

Views

Prove that $ab> \frac {a+b}{n}$

Published on 15 Apr 2026 - 4:37

score 39 · Answer 13 · 2026-04-16 03:45:26

39

Views

Is it true that $ a_k:= \sum_{n=1}^{k} \text{sgn}(\sin(n)) $ only takes values from $ \{ -2, -1, 0, 1, 2, 3 \},\ $ and if so, how do we prove it?

Published on 16 Apr 2026 - 3:45

score 163 · Answer 14 · 2026-04-17 06:31:40

163

Views

Finding the smallest $k$ such that $a^3+b^3+c^3+kabc\leq\frac16(k+3)(a^2(b+c)+b^2(a+c)+c^2(a+b))$, where $a,b,c$ are sides of a triangle

Published on 17 Apr 2026 - 6:31

score 78 · Answer 15 · 2026-04-13 20:02:31

78

Views

If the sum of the angles of elevation is $90^\circ$, what is the height of the Helicopter? A mathematical puzzle.

Published on 13 Apr 2026 - 20:02

List Question

The sum of a number and its reciprocal is 5 (1/5) . Find the number.

A rectangular pig pen is built against an existing brick fence. $24$ m of fencing was used to enclose $70$ m$^2$. Find the dimensions of the pen

Multiple steps of branching probabilities

Finding $k$ such that a modulus equation has one root

Sketch the set $A\cap B$ in the Argand plane, where $A=\{z:|\frac{z+1}{z-1}|\leq 1\}$ and $B=\{z:|z|-\operatorname{Re}z\leq 1\}$

Does every positive, decreasing, real sequence whose series converges have a corresponding convex sequence greater than it whose series converges?

Do i have to add an auxiliary variable when adding a new equality constraint at a LP?

How can I learn Undergraduate Mathematics by self-study as my college lectures are not clear enough?

Schaum's outlines general topology problem $38$

Four very closely related questions on "crossing the border" between convergent/divergent positive real series.

Find positive numbers $n$ and $a_1, \dots, a_n$ such that $a_1 + \dots + a_n = 1000$ and $a_1a_2 \cdots a_n$ is as large as possible.

Prove that $ab> \frac {a+b}{n}$

Is it true that $ a_k:= \sum_{n=1}^{k} \text{sgn}(\sin(n)) $ only takes values from $ \{ -2, -1, 0, 1, 2, 3 \},\ $ and if so, how do we prove it?

Finding the smallest $k$ such that $a^3+b^3+c^3+kabc\leq\frac16(k+3)(a^2(b+c)+b^2(a+c)+c^2(a+b))$, where $a,b,c$ are sides of a triangle

If the sum of the angles of elevation is $90^\circ$, what is the height of the Helicopter? A mathematical puzzle.

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