## The domain of the function f(x) = \frac(sqrt(x-1))(x+1) GMAT Quant Question

The domain of the function f(x) = \frac(x-1)(x+1) is the set of all real numbers that are:  Oof–that’s a huge chunk of code, which I had to put on here just so you could find it! Sorry–let’s try that one again in a way that actually makes some sense… The domain of the function f(x) … Read More

## VERY Difficult GMAT Properties Question (with Relative Primes!)

Relative Primes in GMAT Properties of Numbers questions. Scary stuff! I’m sure you’re here not for the explanation but for the video. With that in mind, let’s keep this short: This GMAT Properties of Numbers question itself is bit of a logical nightmare. If you’re not really going for 700+, I’d advise just skipping it … Read More

## RELATIVE PRIMES in GMAT Properties of Numbers

WTF are Relative Primes in GMAT Properties of Numbers? Learn more here… This is a slightly different approach from a normal video for me. This isn’t actually the solution to an Official Question as I normally do. This discusses a particular topic within Properties: Relative Primes. In a technical sense, the term “Relative Primes” means … Read More