Question

1 2 3 4 5 1. In the sequence 2'3'4'5'6 the nth term is expressed as n n А. n-1 2n В. D C. n-1 n+1 n +1 n-1 2. Which of the following sequences is not an arithmetic sequence? A 1/2, 1/4, 1/6 B. 8,3, -2, -7. C.1/3, 2/3, 1.... D. 3,2,1,0,... 3. Which of the following sequences is an arithmetic sequence? A. 3,1... B. 4, 8, 16, 32 C. 1 1 1 2'3'4'" D. -3,4,5,.. 4. Find the common difference in the arithmetic sequence 10, 6, 2,-2, .. A 4 B. 4 C. 1/4 D. 10 5. What is the 11h term of the arithmetic sequence 3, 7, 11, 15, ...? A 73 B. 63 C. 53 D. 43 6. Which term of the arithmetic sequence 7, 1, -5, -11,... is 47 ? A. 9th term B. 10 term C. 11th term D. 12th term 7. The 4th term of an arithmetic sequence is 9 and the 15th term is 31. What is the common difference? A.2 B. 3 C. -2 D. -3 8. What is the first term of the arithmetic sequence in #7 ? A7 B. 5 C.3 D.2 9. Write a formula for the general term of the arithmetic sequence: 2,7,12, 17 and 22 A an - 2n+ 5 B. a = 5n. C. an=5n-3 D. an= 5n + 3 10. What is the next term of the sequence 1,1,2,3,5,8,13...? A 18 B. 19 C. 20 D. 21 11. If three arithmetic means are inserted between 9 and 25, what is the second arithmetic mes A 13 B. 17 C.21 D.29 12. Write the first four terms of the sequence in which an = 2 + (n - 1)3. A. 6, 9, 12,15 B. 3,6,9,12 C. 5,8,11,14 D. 2,5,8,11 a 13. Which of the following is a formula for arithmetic series? A. S = (a + an) B.S. =(+ a) C.S. (a + d) D. S = (a + da - an


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Answer 1

Answer:

This is a little hard

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