We use cookies to personalise content and advertisements and to analyse access to our website. Furthermore, our partners for online advertising receive pseudonymised information about your use of our website. cookie policy and privacy policy.
 
+0  
 
0
96
1
avatar

How many terms of the arithmetic sequence 88, 85, 82, . . . appear before the number -17 appears?

 Oct 6, 2018

Best Answer 

 #1
avatar
+1

[L - F] / D + 1 = N, where L=Last term, F=First term, D=Common difference, N=Number of terms

[-17 - 88] / -3 + 1 =N

[- 105] / - 3 + 1 = N

[-105/-3] + 1 = N

    35       + 1 =N

N = 36 - So -17 is the 36th term - 1 =35 terms before -17 appears.

 Oct 7, 2018
 #1
avatar
+1
Best Answer

[L - F] / D + 1 = N, where L=Last term, F=First term, D=Common difference, N=Number of terms

[-17 - 88] / -3 + 1 =N

[- 105] / - 3 + 1 = N

[-105/-3] + 1 = N

    35       + 1 =N

N = 36 - So -17 is the 36th term - 1 =35 terms before -17 appears.

Guest Oct 7, 2018

20 Online Users

avatar
avatar
avatar