Asked by Keonn'a
The following problem refers to an arithmetic sequence. If a_5=9 and a_14=18. Find the term a_1, the common difference and then find a_24.
Answers
Answered by
scott
a5 to a14 is 9 terms (differences)
... 18 - 9 = 9 ... so the common difference is ... 9/9 or 1
a5 is 4 terms (differences) from a1 ... a1 = a5 - 4 = 9 - 4 = 5
... you can check using a14
a24 is 23 differences from a1 ... you can calculate it
... 18 - 9 = 9 ... so the common difference is ... 9/9 or 1
a5 is 4 terms (differences) from a1 ... a1 = a5 - 4 = 9 - 4 = 5
... you can check using a14
a24 is 23 differences from a1 ... you can calculate it
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