Geometric Sequences & Series [IB Math AI SL/HL] 

You're saving my life, and I will forever be in your debt because of it.

27, -9, 3, -1, 1 over 3, another way of knowing that the common ratio is 1/3 is by looking at the last 2 given terms, -1 the last whole number becoming 1/3, would mean that the common ratio is only able to take away 2/3 therefore the common ratio is 1/3, this is easier in my opinion unless they ask you to do the calculation and write it down. Great video.

I am going into DP this year and this is literally sooo helpful thank you so much

thanks man hl student here just viewing this for revision for our mocks

very precise video ngl

So in arthicmetic the common difference can be adding and subtracting, so is it the same concept where the geometric sequence can be multiplied or there can be division?

thank you so much

Will they give us these formulae during exam？

But what about when I am tasked with finding the first positive/negative term in a sequence? How may I be able to perform this operation through my GDC?