1) The first three terms of an=3n+2 a) 5,8,11,... b) 5,8,12,... c) 6,8,11,... d) 6,8,12,... e) 5,8,14,... f) 6,8,14,... 2) The first three terms of an=(-1)n(n+3) a) -4,5,-6,... b) 4,5,6,... c) -4,-5,-6,... d) 4,-5,6,... e) 3,4,5,... f) -3,4,-5,... 3) Given a1=7 where an=an-1+5 for n>1, the first three terms are a) 7,12,17,... b) 12,17,22,... c) 7,17,27,... d) 7,12,15,... e) -7,-12,-17,... f) 7,12,22,.. 4) Given a1=200 and d= - 20. The first three terms are a) 200,220,240,... b) 200,180,160,... c) 260,240,220,... d) 200,240,280,... 5) Given a1= - 8 and d=5. The first three terms are a) -8,-3,2,... b) 8,13,21,... c) -8,-13,-21,... d) -8,3,2,... e) -8,3,-2,... f) 8,3,2,... 6) Find a16 if a1=9 and d=2 a) 39 b) 36 c) 33 d) 32 e) 37 f) 38 7) Find a50 if a1=7and d=5 a) 252 b) 225 c) 255 d) 522 e) 525 f) 552 8) Find the sum of the first 20 terms of the arithmetic sequence: 4, 10, 16, 22, … a) 1220 b) 1022 c) 1202 d) 1002 e) 1200 f) 1020 9) Find the sum of the first 25 terms of the arithmetic sequence: 7, 19, 31, 43, … a) 3775 b) 3757 c) 3575 d) 3557 e) 3777 f) 3577 10) Find the sum of the first 50 terms of the arithmetic sequence: -15, -9, -3, 3, … a) 6600 b) 6060 c) 6660 d) 6069 e) 6006 f) 6666 11) Arithmetic mean between 52 and 354 a) 203 b) 202 c) 230 d) 223 e) 222 f) 200 12) Arithmetic mean between -32 and 78 a) 23 b) 32 c) 22 d) 33 e) 20 f) 30 13) The first three terms of geometric series; a1=5,r=3 a) 5,15,45,... b) 5,20,45,... c) 5,15,30,... d) 5,15,25,... e) 5,15,55,... f) 5,25,45,... 14) Find a8 when a1=1,000,000 and d=0.1 a) 0.1 b) 0.01 c) 0.001 d) 10 e) 100 f) 0.11 15) Find the sum of the first 12 terms of the geometric sequence: 2, 6, 18, 54, … a) 531440 b) 531404 c) 531444 d) 513440 e) 531044 f) 513404 16) Find the sum of the first 11 terms of the geometric sequence: 3, -6, 12, -24, … a) 2049 b) 2409 c) 2904 d) 2094 e) 2490 f) 2940 17) Find the geometric mean between 5 and 34 a) sqrt(170) b) 170 c) sqrt(160) d) 19.5 e) sqrt(19.5) f) sqrt(39) 18) Find the geometric mean between 10 and 28 a) sqrt(280) b) 2sqrt(70) c) 280 d) 38 e) sqrt(38) f) sqrt(70)

Sequence & Series

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