# New post in Proof-verification

July 30th, 2022

## Verify the identiy, (cos(x+h) - sin x)/h = cos x * ((cos h - 1)/h)- sin x * (sin h /h)

October 10th, 2020

## Show that $(1+x)^n$ = .... Hence deduce that .... = $2^n$

August 21st, 2020

## Voltage Current and Voltage Charge Relationship for a Capacitor

August 28th, 2020

August 1st, 2022

August 1st, 2022

## proving that if $x^2 + x + 1$ is even, then $x$ is odd by induction

November 22nd, 2020

August 1st, 2022

August 1st, 2022

April 10th, 2020

August 1st, 2022

## Prove that if f g and 2 are bounded, then f is also bounded

October 5th, 2020

March 22nd, 2020

## Prove that each of the following sets, with the indicated operation, is an abelian group

February 1st, 2020

## Show that there is an identity element with respect to the operation $+$ and every subset $A$ of $D$ has an inverse with respect to $+$

February 2nd, 2020

## Prove Nth derivative expression by induction

November 2nd, 2020

## Using proof by contradiction to show that $x<y \implies \sqrt x < \sqrt y$

October 24th, 2020

August 1st, 2022

## Proof Verification: Comparison Property for Integrals

February 20th, 2020

## What is the logic proof that ¬ (∃x)(Fx) => (∀x)(Fx → Gx)

September 13th, 2020

## How is $f(x)=\tan(x)$ bijective for $(-\frac{\pi}{2}, \frac{\pi}{2})$ and not for an unrestricted domain?

November 16th, 2020

August 1st, 2022

August 1st, 2022

March 4th, 2020

May 20th, 2020

August 1st, 2022

August 1st, 2022

June 19th, 2020

March 16th, 2020

## Proving Row-Equivalence

January 22nd, 2020