How to prove one-one function
by Vulch, Apr 11, 2025, 8:03 PM
Hello everyone,
I am learning functional equations.
To prove the below problem one -one function,I have taken two non-negative real numbers
from the domain
and put those numbers into the given function f(x)=1/x.It gives us 1=1/2.But it's not true.So ,it can't be one-one function.But in the answer,it is one-one function.Would anyone enlighten me where is my fault? Thank you!
I am learning functional equations.
To prove the below problem one -one function,I have taken two non-negative real numbers


This post has been edited 3 times. Last edited by Vulch, Yesterday at 8:07 PM
Inequalities
by sqing, Apr 11, 2025, 3:53 AM
JEE Related ig?
by mikkymini2, Apr 10, 2025, 2:54 PM
Hey everyone,
Just wanted to see if there are any other JEE aspirants on this forum currently prepping for it[mention year if you can]
I am actually entering 10th this year and have decided to try for it...So this year is just going to go in me strengthening my math (IOQM level (heard its enough till Mains part, so will start from there) for the problem solving part, and learn some topics from 11th and 12th as well)
It would be great to connect with others who are going through the same thing - share study strategies, tips, resources, discuss, and maybe even form study groups(not sure how to tho
) and motivate each other ig?. 
So yea, cya later
Just wanted to see if there are any other JEE aspirants on this forum currently prepping for it[mention year if you can]
I am actually entering 10th this year and have decided to try for it...So this year is just going to go in me strengthening my math (IOQM level (heard its enough till Mains part, so will start from there) for the problem solving part, and learn some topics from 11th and 12th as well)
It would be great to connect with others who are going through the same thing - share study strategies, tips, resources, discuss, and maybe even form study groups(not sure how to tho


So yea, cya later
L
lcm(1,2,3,...,n)
by lgx57, Apr 9, 2025, 7:41 AM
Geometry problem about Euler line
by lgx57, Apr 9, 2025, 7:36 AM
If the Euler line of a triangle is parallel to one side of the triangle, what is the relationship between the sides of this triangle?
The relationship between the angles of this triangle
The relationship between the angles of this triangle

one very nice!
by MihaiT, Mar 31, 2025, 4:43 AM
Given
weights, each weighing
and another
weights with
each. Write a algorithm that determines the ways in which a scale can be balanced with a weight
on the left pan, and display the number of possible solutions. (The weights can be placed on both pans and the program starts with the numbers
. What will be displayed after three successive runs: 5,2,5,1,4 | 5,2,5,1,11 | 5,2,5,1,20?
One answer is possible:
a)10;5;0;
b)20;7;0;
c)20;7;1;
d)10;10;0;
e)10;7;0;
f)20;5;0,






One answer is possible:
a)10;5;0;
b)20;7;0;
c)20;7;1;
d)10;10;0;
e)10;7;0;
f)20;5;0,
Let a,b,c > 0 such that a+b+c=3. Prove that $ \frac{a^2}{a^2-2a+4} + \frac{b^2
by bo_ngu_toan, Jun 4, 2023, 11:34 AM
Inequality
by math2000, Jan 22, 2021, 5:51 AM
Let
.Prove that 


This post has been edited 1 time. Last edited by math2000, Jan 22, 2021, 6:12 AM
Reason: Error
Reason: Error
"Where wisdom and valor fail, all that remains is faith. . . And it can overcome all." -Toa Mata Tahu
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