difference between 12th term and 8th term of an arithmetic sequence is 20. find the common difference
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difference between 12th term and 8th term of an arithmetic sequence is 20. find the common difference
difference between 12th term and 8th term of an arithmetic sequence is 20. find the common difference
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Answer:
d = 20/3 or 6.66
Step-by-step explanation:
a12 - a8 = 20
a + (11-1)d - [ a + (8-1)d] = 20
a + 10d - a - 7d = 20
3d = 20
d = 20/3 = 6.66...
Verified answer
Answer:
5
Step-by-step explanation:
T12-T8=20
N term=a+(n-1)d
a+(12-1)d-a+(8-1)d=20
11d-7d=20
4d=20
d=20/4
d=5