Quadratic Sequences (Grade 11 NSC Matric Mathematics): Flashcards

Sequence where second difference is constant

Subtract each term from the next term

Subtract consecutive first differences

Check if second differences are constant

$T_n = an^2 + bn + c$

Second difference = $2a$

Parabolic curve

Value of the nth term

Use first three terms, set up simultaneous equations

Position number (1st term, 2nd term, etc.)