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secondary 4 | E Maths
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Sabrina
Sabrina

secondary 4 chevron_right E Maths

I need help with the ticked qns :(

Date Posted: 6 years ago
Views: 285
Nur
Nur
6 years ago
Do you learn any formula for nth term?
Sabrina
Sabrina
6 years ago
I did, but I don't really memorise every formula...
Nur
Nur
6 years ago
Ohh may I know the formula you have learned? Mine is probably slightly different from yours.
Sabrina
Sabrina
6 years ago
There's quite a few... for eg:
1) 2n+1
2) 8+3^n
3) n^3
4) 2^11-2
5) 3×2^n-1

^ means to the power of
Nur
Nur
6 years ago
Ohh have you tried using any one of the formulae to solve the nth term question?
Sabrina
Sabrina
6 years ago
I did but I don't think any of them worked :/
Nur
Nur
6 years ago
Ohh I guess you could try out the formula I learn, an^2 + bn + c
Sabrina
Sabrina
6 years ago
I'm sorry but can you give me an example on how to apply that formula? :(
Nur
Nur
6 years ago
Fractorise an^2 + bn + c, you will get a+b=-c and 4a+2b=-c. C is the 1st term, a+b is the 2nd term and 4a+2b is the third term. Hope this helps (:
Sabrina
Sabrina
6 years ago
Thank you so much!!!
Sabrina
Sabrina
6 years ago
I really appreciate it ^^
Nur
Nur
6 years ago
Did you manage to find the answer yet?

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Tham KY
Tham Ky's answer
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Wish it helps you...
Sabrina
Sabrina
6 years ago
Thank you so much for your time! I really appreciate it!!