Question

Find the exact number of times $f(x)=\displaystyle\sum_{n\neq 0}\frac{1}{n^{4.01}}e^{inx}$ is continuously differentiable.

score 63 · Answer 1 · 2026-05-14 05:18:49

63

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Find the exact number of times $f(x)=\displaystyle\sum_{n\neq 0}\frac{1}{n^{4.01}}e^{inx}$ is continuously differentiable.

Published on 14 May 2026 - 5:18

score 115 · Answer 2 · 2026-04-17 13:45:37

115

Views

either inequality $\frac{2\ln(\cos{x})}{x^2}\lt \frac{x^2}{12}-1$ is hard or I need to go back to study ASAP

Published on 17 Apr 2026 - 13:45

score 183 · Answer 3 · 2026-04-11 16:55:38

183

Views

Uniformly scaled a cuboid to fit inside another cuboid

Published on 11 Apr 2026 - 16:55

score 38 · Answer 4 · 2026-05-10 20:40:40

38

Views

How to calculate tangent of function, which has to cross certain value on x axis

Published on 10 May 2026 - 20:40

score 144 · Answer 5 · 2026-05-11 00:05:37

144

Views

Kummer-type transformation for a special 2F2 hypergeometric function

Published on 11 May 2026 - 0:05

score 200 · Answer 6 · 2026-04-28 21:26:53

200

Views

Antiderivative of $1/x$, why can $C_1$ and $C_2$ differ?

Published on 28 Apr 2026 - 21:26

score 126 · Answer 7 · 2026-04-15 20:08:44

126

Views

$f(x+y)=f(x) \times f(y)$, $f$ taking values in $[0,1]$

Published on 15 Apr 2026 - 20:08

score 482 · Answer 8 · 2026-04-15 05:34:28

482

Views

derivative of a function of vector norm with respect to vector

Published on 15 Apr 2026 - 5:34

score 73 · Answer 9 · 2026-04-28 21:25:40

73

Views

Improper integral problem not easy to solve with exponential in the denominator

Published on 28 Apr 2026 - 21:25

score 706 · Answer 10 · 2026-04-11 21:17:44

706

Views

Power series and intervals of convergence

Published on 11 Apr 2026 - 21:17

score 69 · Answer 11 · 2026-04-16 16:32:37

Given the curve $y = 2 x ^3 + 3 x ^2 − 36 x$ on the interval $− 1 \le x \le4$ , find the absolute minimum?

score 183 · Answer 12 · 2026-04-17 11:20:17

183

Views

Use of MVT in this proof

Published on 17 Apr 2026 - 11:20

score 70 · Answer 13 · 2026-04-14 01:39:27

70

Views

Functional equation $f(\lfloor x \rfloor y)=f(x)f(\lfloor y\rfloor)$

Published on 14 Apr 2026 - 1:39

score 79 · Answer 14 · 2026-04-14 06:28:47

79

Views

The reason why $\frac{a+b}{2}=c$ in a quadratic.

Published on 14 Apr 2026 - 6:28

score 122 · Answer 15 · 2026-04-24 11:07:07

122

Views

Showing limit does not exist at c ≠0.

Published on 24 Apr 2026 - 11:07

List Question

Find the exact number of times $f(x)=\displaystyle\sum_{n\neq 0}\frac{1}{n^{4.01}}e^{inx}$ is continuously differentiable.

either inequality $\frac{2\ln(\cos{x})}{x^2}\lt \frac{x^2}{12}-1$ is hard or I need to go back to study ASAP

Uniformly scaled a cuboid to fit inside another cuboid

How to calculate tangent of function, which has to cross certain value on x axis

Kummer-type transformation for a special 2F2 hypergeometric function

Antiderivative of $1/x$, why can $C_1$ and $C_2$ differ?

$f(x+y)=f(x) \times f(y)$, $f$ taking values in $[0,1]$

derivative of a function of vector norm with respect to vector

Improper integral problem not easy to solve with exponential in the denominator

Power series and intervals of convergence

Given the curve $y = 2 x ^3 + 3 x ^2 − 36 x$ on the interval $− 1 \le x \le4$ , find the absolute minimum?

Use of MVT in this proof

Functional equation $f(\lfloor x \rfloor y)=f(x)f(\lfloor y\rfloor)$

The reason why $\frac{a+b}{2}=c$ in a quadratic.

Showing limit does not exist at c ≠0.

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