Nice, ive not seen it done this way before! I do something similar but use the first values for each sequence and use the equations, a+b+c, 3a+b and 2a but i have found they are hard for some to remember. Im definitely gonna try this out.
If you only had 2n^2 + 3n then substituting n=1 would result in a first term of only 5. Hence you would need to add a 4 to make the first term 9 instead. I hope this makes sense!
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Nice, ive not seen it done this way before! I do something similar but use the first values for each sequence and use the equations, a+b+c, 3a+b and 2a but i have found they are hard for some to remember. Im definitely gonna try this out.
So glad you like this method.
I haven't seen it used very often but in my experience, it is the easiest for students to remember - enjoy!
this is really helpful thank you!
Great to hear! Thanks!!! 👍🤓😊
excuse me, I used another method and got c=0. can you explain, please?
Could you let me know for which of the examples?
@@AceMaths The first one, please. Thanks!
@@AceMaths I got "2n^2 + 3n". btw, in igcse (grade 10)
If you only had 2n^2 + 3n then substituting n=1 would result in a first term of only 5. Hence you would need to add a 4 to make the first term 9 instead. I hope this makes sense!
Alternatively stick to my method and the values of a, b and c will lead you to the correct solution