Asked by Boadi Yiadom Ellen
Find the sum of first thirteen terms of a linear sequence whose 8th term is 18 and 11th term is 24.
Answers
Answered by
Boadi Yiadom Ellen
Please solve it for me
Answered by
Reiny
Just use your formulas
"8th term is 18" ---> a + 7d = 18
"11th term is 24 ---> a + 10d = 24
subtract them:
3d = 6
d = 2
in a+7d = 18 ---> a + 14 = 18 , a = 4
now use your sum(n) formula
your
a = 4
d = 2
n = 13
"8th term is 18" ---> a + 7d = 18
"11th term is 24 ---> a + 10d = 24
subtract them:
3d = 6
d = 2
in a+7d = 18 ---> a + 14 = 18 , a = 4
now use your sum(n) formula
your
a = 4
d = 2
n = 13
Answered by
Rich Eugene
Find the sum of the first 13th term of a A P whose 8th term is 18 and 11th term is 24
Answered by
Rich Eugene
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