Which of the following is not an AP? (a) -1.2, 0.8, 2.8, .... (b) `3, 3+ sqrt(2), 3+ 2sqrt(2), 3+3sqrt(2), ...... ` (c) 4/3, 7/3, 9/3, 12/3, ..... (d) -1/5, -2/5, -3/5,...

Which of the following is irrational? (a) (2-sqrt3)2 (b) (sqrt2+sqrt3)2 (c) (sqrt2-sqrt3)(sqrt2+sqrt3) (d) (2sqrt7)/7

3sqrt(2^(5))sqrt(4^(9))sqrt(8)=

Which of the following are Aps? If they form an AP, find the common difference d and write the next three terms. (i) 24m8m16,….. (ii) 2,5/2, 3, 7/2 ,….. (iii) -1.2, -3.2, -5.2, -7.2 ,…….. (iv) -10,-6,-2,2 ,……….. (v) 3,3+sqrt(2), 3+2sqrt(2), 3+3sqrt(2) ,.......... (vi) 0.2, 0.22, 0.222, 0.2222,..... (vii) 0,-4, -8,-12 ,.......... (viii) -1/2, -1/2, -1/2, -1/2 ,........... (ix) 1,3,9,27,....... (x) a,2a, 3a, 4a,....... (xi) a, a^(2), a^(3), a^(4) ,......... (xii) sqrt(2), sqrt(8), sqrt(18), sqrt(32) ,...... (xiii) sqrt(3), sqrt(6), sqrt(9), sqrt(12) ,...............

Write the n^(th) term of the AP: a] 13,8,3,-2,….. b] sqrt(2), 3 sqrt2, 5 sqrt2, ….. c] 121, 117 , 113, ….. d] (3)/(4), (5)/(4) , (7)/(4), …. e] -15, -10, -5, 0, ….....

1/(sqrt(9)-\ sqrt(8)) is equal to: (a) 3+2sqrt(2) (b) 1/(3+2sqrt(2)) (c) 3-2sqrt(2) (d) 3/2-\ sqrt(2)