Asked by Aly
The 20th term of an arithmetic sequence is 27 and the first term is -11. What is the common difference??
Answers
Answered by
Reiny
using the standard notation:
term(20) = a + 19d = 27
and
a = -11
-11 + 19d = 27
19d = 38
d = 2
the common difference is 2
check:
term(2) = a+19d
=-11 + 19(2)
= -11+38
= 27
term(20) = a + 19d = 27
and
a = -11
-11 + 19d = 27
19d = 38
d = 2
the common difference is 2
check:
term(2) = a+19d
=-11 + 19(2)
= -11+38
= 27
There are no AI answers yet. The ability to request AI answers is coming soon!
Submit Your Answer
We prioritize human answers over AI answers.
If you are human, and you can answer this question, please submit your answer.