# Learn Indirect Proof with Plainmath's In-Depth Explanations and Real-World Examples

Recent questions in Indirect Proof
jorgejasso85xvx 2022-11-19

## Suppose that $\mathcal{U}$ is the universal set, and that $A$, $B$ and $C$ are three arbitrary sets of elements of $U$. Prove that if $C\beta A=B$, then the intersection of $A$ and $B$ is empty. Hint: use an indirect proof.

piopiopioirp 2022-11-19

## Prove the following through an indirect proof-if $m+n$ is even, then $m$ and $n$ are even or $m$ and $n$ are odd.

Barrett Osborn 2022-11-18

## Does proving that two lines are parallel require a postulate?

Filloltarninsv9p 2022-11-15

## Discrete math: proofsFor any three integers $\pi ,\pi $, and $\pi $, if $\pi $ is divisible by $\pi $ and $\pi $ is divisible by $\pi $, then $\pi $ is divisible by $\pi $.

Kameron Wang 2022-11-04

## Use an indirect proof to show that if ${x}^{3}+x\beta 1>10$ then $x>1$.

Vincent Norman 2022-10-30

## Prove for all positive real numbers $x$ and $y$, if $x+y\beta €\left(4xy\right)/\left(x+y\right)$, then $x=y$

Maverick Avery 2022-10-28

## Prove the square root of $2$ is an irrational number.

Paloma Sanford 2022-10-26

## Why are direct proofs often considered better than indirect proofs?

Winston Todd 2022-10-16

## Let $a,b$ and $c$ be real numbers where $a>b$. Prove that if $ac\beta €bc$, then $c\beta €0$.

mafalexpicsak 2022-10-15

## What is the negation of " $A\beta B$ "?

Aldo Ashley 2022-10-13

## How to prove a function has no local minima.?$f:{\mathbb{R}}^{2}\beta \mathbb{R}$ , of class ${C}^{2}$

vagnhestagn 2022-10-08

## Let $G$be an acyclic graph with $c$ components. Show that the number of edges of $G$ is $n\beta c$.

hikstac0 2022-10-07

## Suppose ${x}_{1},{x}_{2},{x}_{3}\beta \mathbb{R}$. Prove that one of the ${x}_{i}$ must be greater than or equal to the average $\frac{1}{3}\left({x}_{1}+{x}_{2}+{x}_{3}\right)$.

Charlie Conner 2022-10-06

## Prove that $\frac{2022}{n}+4n$ is a perfect square iff $\frac{2022}{n}\beta 8n$ is a perfect square

Sincere Garcia 2022-10-03

## If $\left(n+1{\right)}^{2}$ is even then $n$ is oddfind what proof works best with this question

Diana Suarez 2022-09-27

## Is it possible to prove directly that even perfect squares have even square roots? Or, symbolically:

Medenovgj 2022-09-26