Revision – Algebra (Complex Numbers, Sequences, Binomial)

Grade 11 Maths — Revision – Algebra (Complex Numbers, Sequences, Binomial): 25 practice questions with instant scoring and explanations.

1. A complex number is of the form:
2. In a + bi, i² =:
3. The modulus of z = a + bi is:
4. The conjugate of z = a + bi is:
5. If z = 3 + 4i, then |z| =:
6. A sequence is:
7. An arithmetic sequence has:
8. nth term of AP: aₙ =:
9. Sum of n terms of AP: Sₙ =:
10. A geometric sequence has:
11. nth term of GP: aₙ =:
12. Sum of n terms of GP (r ≠ 1): Sₙ =:
13. Sum of infinite GP (|r| < 1) =:
14. Binomial Theorem states:
15. C(n, r) = :
16. C(n, 0) =:
17. C(n, n) =:
18. C(n, r) = C(n, ?)
19. (x + y)³ =:
20. General term in (a + b)^n =:
21. Number of terms in (a + b)^n =:
22. Middle term in (a + b)^(2n) =:
23. The ratio in 1 + 1/2 + 1/4 + ... is:
24. If 2, x, 8 are in GP, then x =:
25. If 1, 2, 3, ... are in AP, then common difference =: