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In one of your videos you have two fractions that equal each other and when you spot that they both have n(n-1) in their numerator's spot you cancel them. Is that possible and how so?

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I think you made a mistake in video 1 under lesson 7. In question 4 you ask us what exponent b would have if it was term 20, and then you go on to explain that the b's exponent value will be 1 less than its term number, therefore, if it was term 20 the number would have been 19, however, in the video you wrote the answer as 20... Am I wrong?

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sum of first three terms is 304,  S6 = 1330

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sum of first three terms is 304,  S6 = 1330

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How can the PlySmlt2 app be used to find solutions to equations such as the r^6 + ... r^3 + ... one that we had during today's lesson?

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How can the PlySmlt2 app be used to find solutions to equations such as the r^6 + ... r^3 + ... one that we had during today's lesson?

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Can we see how the two geometric sum formulas produce the same result?

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Can we see how the two geometric sum formulas produce the same result?

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The first question for the first video, Sums or A and G sequences - seems like there's an error there.

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Just to clarify when doing this equation is it the same as saying 1-(0.5^15) ?

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The problem we were talking about in video 1 at 14:39 didn't give the same result with the other formula you gave us...
I checked it a couple times but it didn't work. Am I doing something wrong?

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Can r = 4  and  r = -4 in this problem... ?

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Can r = 4  and  r = -4 in this problem... ?

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I had a bit of trouble finding the sigma formula/equation for 2e in the bottom of the practise assignment. Is there a way you can generally find the sigma equations or formulas quickly because that was one of my struggles.

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I think you made an error at 2:47...
Question d doesn't have a common ratio of 2x if you look at the third term compared to the second term. Am I wrong?

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When you write a recursive rule does it have to include specifically U1 or can it just use a previous term? Would this be the recursive rule for a geometric sequence:
Un=U1 * r^n-1
or would you just call this a rule for finding Un?
Basically the question summed up is how do you define a recursive rule?

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Where can the Sigma Notation button be found on the calculator?

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Where can the Sigma Notation button be found on the calculator?

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Number Patterns and Sigma Notation Practice

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Number Patterns and Sigma Notation Practice

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Is there a typo in Exercise 1B, number 2d in the progression? It feels like the third term should be sixteen.

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Add video links or website links that have helped you grow in your understanding of this unit or topics in this unit.

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Add video links or website links that have helped you grow in your understanding of this unit or topics in this unit.