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The fifth term of an arithmetic sequence is 9 and the 32nd term is -84. What is the 23rd term?

Guest Jul 7, 2017

Best Answer 

 #1
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  9 = 4 D + F

-84 =31D + F

 

F=205/9 First term

D=-31/9 Common difference

23rd =205/9 + (23 -1)*(-31/9)

23rd = -53 The 23rd term.                                                                                                                 

Guest Jul 7, 2017
 #1
avatar
0
Best Answer


  9 = 4 D + F

-84 =31D + F

 

F=205/9 First term

D=-31/9 Common difference

23rd =205/9 + (23 -1)*(-31/9)

23rd = -53 The 23rd term.                                                                                                                 

Guest Jul 7, 2017

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