User Yanjan. Kaf.

4 votes

2 answers

83 views

How we come up with the $(n-r+1)$ part in permutation formula.

asked Jul 19, 2023 at 14:23

3 votes

2 answers

119 views

for $x \in \mathbb{R}$ find the number of solutions in $3x^2 + 4|x^2 - 1| + x - 1 = 0$. Why we are considering negative values here?

asked Jul 23, 2023 at 6:40

3 votes

2 answers

382 views

why do we put equal to zero when trying to solve the polynomial inequality?

asked Jul 29, 2023 at 17:39

3 votes

1 answer

450 views

How can we prove that a number is not happy number?

asked May 10 at 7:05

1 vote

2 answers

65 views

does sign of a rational or polynomial equations remains the same for entire interval?

asked Jul 30, 2023 at 17:33

1 vote

2 answers

154 views

In how many ways we can create unique pairs of two numbers from $[1,9]$, such that the difference between them is never $1$?

asked Jul 25, 2023 at 16:52

0 votes

2 answers

80 views

How to find the number of solutions for $|x^2 - 4| = c$, is this just guess work, if so whats the approch?

asked Nov 3, 2023 at 3:48

-1 votes

1 answer

46 views

Counting the numbers of quantifiers, how are there 4?

asked Mar 4 at 9:56

-1 votes

2 answers

79 views

How do we prove $A=\mathbb{Z}$ if, $A=\{5x-3|x\in \mathbb{Z}\}$

asked Aug 11, 2023 at 10:14

-2 votes

1 answer

90 views

can you explain the notation used in the book. [closed]

asked Apr 12, 2023 at 6:23

-4 votes

4 answers

133 views

why is the co-prime part not mentioned in the definition of the rational number?

asked Mar 15 at 4:11

Stack Exchange Network

11 Questions

How we come up with the $(n-r+1)$ part in permutation formula.

for $x \in \mathbb{R}$ find the number of solutions in $3x^2 + 4|x^2 - 1| + x - 1 = 0$. Why we are considering negative values here?

why do we put equal to zero when trying to solve the polynomial inequality?

How can we prove that a number is not happy number?

does sign of a rational or polynomial equations remains the same for entire interval?

In how many ways we can create unique pairs of two numbers from $[1,9]$, such that the difference between them is never $1$?

How to find the number of solutions for $|x^2 - 4| = c$, is this just guess work, if so whats the approch?

Counting the numbers of quantifiers, how are there 4?

How do we prove $A=\mathbb{Z}$ if, $A=\{5x-3|x\in \mathbb{Z}\}$

can you explain the notation used in the book. [closed]

why is the co-prime part not mentioned in the definition of the rational number?