And then we've shown in other videos that v prime of x is going to be very similar to if this was log base e or natural log, except we're going to scale it. So it's going to be one over, one over log base four, oh sorry, one over the natural log, the natural log of four times x. If this was v of x, if v of x was just natural log of x, our derivative would be one over x. But since it's log base four, and this comes straight out of the change of base formulas that you might have seen. And we have a video where we show this. But we just scale it in the denominator with this natural log of four. Or you could think of scaling the whole expression by one over the natural log of four.