9 . F Find the sum of the arithmetic series - 6 + 1 + 8 + 15 + . . . + 50 +... + 757 . (a) 41305 (b) 39840 (c) 82766 (d) 44402 (e) 29780 10. Find the 12th term of geometric sequence - 1, 2, - 4,.... (a) 4096 (b) - 5410 (c) 2048 (d) - 1024 (e) -512 1 1. Find the nth term of geometric sequence which has a = 243, and r = - 3. (a) 2(3) n-1 (b ) - 2(3 ) n - 1 (c) - 3(2 ) 7 - 1 (d) - (- 2) 2-1 (e) - (-3) m-1 12. Find the 10th term of geometric sequence whice has a, = }; a. = 31 (a) 19683 (b) - 729 (C) 6561 (d) - 59049 (e) 2187 13. Find the sum of the geometric series _ ( - 2)k (a) -2810 (b) -1050 (c) 2820 (d) 2728 (e) 3782 14. Find the sum of the geometric series _ (0.5) (a) ( b ) ? (c) 8 (d) 16 (e) 1 15. Expand (2x + 3)5 using the Binomial Theorem. (a) 32x5 + 48x4+ 72x3 + 108x2 + 162x + 243 (b) 32x5 + 12024 + 720x3 + 6012+ 30x + 243 (c) 25 + 5x4 + 10x3 + 10x2 + 5x + 1 (d) 32x5 + 240x4 + 720x3 + 1080x2 + 810x +243 16. What is the sixth term in the expansion of (22 - 1)'? (a) 84 (b ) - 8426 ( c) 4 (d) - 12623 (e) 7812