The General Term for Quadratic Sequences

[@thehow-2guy874]

You are literally my lord and saviour. Every single other video and website explains this like its some sort of jet propulsion science. Live a blessed life man

[@molloymaths1092]

Thanks. Glad it helped.

[@richardomosanya6777]

who needs grinds when we have you

[@vindeez1811]

For quadratic sequence,
Tn = a + d(n-1) + (c/2)(n-1)(n-2) where
a is the first term,
d is difference between first and second term, and
c is the difference between the differences ( 2nd Difference )
so in this case
a = 11
d = 6
c = -4
Tn = 11 + 6(n-1) + (-4/2)(n-1)(n-2)
= 11 + 6n - 6 - 2(n^2 -3n + 2)
= 5 + 6n -2n^2 + 6n - 4
= -2n^2 + 12n + 1

[@GiaKhanhDinh_08]

I like your style bro

[@molloymaths1092]

Thanks

[@I.am.nedzamba]

Thank you very much

[@molloymaths1092]

You're welcome.