Transition to university

Christian Lawson-Perfect on Solve a linear equation $ax+b = c$ 8 years, 4 months ago

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Christian Lawson-Perfect on Solve a linear equation $ax+b = c$ 8 years, 4 months ago

Saved a checkpoint:

I've split this into two questions.

There was some weirdness with gcds - I've removed that.

Elliott Fletcher on Compute the partial sum of an arithmetic sequence 8 years, 4 months ago

Gave some feedback: Has some problems

Elliott Fletcher on Arithmetic sequences in an ice cream shop 8 years, 4 months ago

Gave some feedback: Needs to be tested

Elliott Fletcher on Partial sum of an arithmetic sequence - birthday money 8 years, 4 months ago

Gave some feedback: Needs to be tested

Elliott Fletcher on Finding the formula for the $n^{\text{th}}$ term of linear sequences 8 years, 4 months ago

Gave some feedback: Needs to be tested

Chris Graham on Finding the formula for the $n^{\text{th}}$ term of linear sequences 8 years, 4 months ago

Gave some feedback: Has some problems

Chris Graham commented on Finding the formula for the $n^{\text{th}}$ term of linear sequences 8 years, 4 months ago

Same issue here with "The amount of numbers in a sequence". Can you re-write anywhere else that we have this phrase please?

Chris Graham on Partial sum of an arithmetic sequence - birthday money 8 years, 4 months ago

Gave some feedback: Has some problems

Chris Graham commented on Partial sum of an arithmetic sequence - birthday money 8 years, 4 months ago

Ok, so we'e basically torn up and re-written the original question... This looks good, however as for previous questions on arithmetic series, can we have a table of the values and differences in the advice to part (a) please.

I would change "by his" in the statement to "after his", as it implies the amount before he receives money on his birthday. I know that you state that it includes the amount after, but this appears contradictory.

I'm not keen on $n$ being "the amount of numbers in a sequence". So if you have 10 terms in the sequence but you're calculating the $a_5$ term, do you still use $n=10$? "Term number" is terminology that is often used. 

Chris Graham commented on Partial sum of an arithmetic sequence - birthday money 8 years, 4 months ago

Sorry, you are quite right, I meant to say interest! If you are wording the question in a way that it is "What contribution...?" then you don't really need this anyway, so I have removed those references.

Elliott Fletcher on Partial sum of an arithmetic sequence - birthday money 8 years, 4 months ago

Gave some feedback: Needs to be tested

Elliott Fletcher commented on Partial sum of an arithmetic sequence - birthday money 8 years, 4 months ago

Is inflation the right term that we need or should it be interest?

Chris Graham commented on Partial sum of an arithmetic sequence - birthday money 8 years, 4 months ago

As discussed, the sum of candles on a birthday cake over several years makes little sense either. Why would you want to know? 

Parents adding money to a bank account is much better, and then you could ask (excluding inflation) how much money the parents have added over $n$ years. 

This can also be split into two parts, firstly calculate $a_n$ for the given $n$, and then the sum of the series, with a step for each part.

Chris Graham commented on Arithmetic sequences in an ice cream shop 8 years, 4 months ago

Elliott, since you've been working on this one already, can we add a step with the equation for an arithmetic sequence and gaps for the first value and difference. In addition, let's put everything before "How many customers..." into the statement.