Question

The eight term of an arithmetic sequence is 15 and fifteenth term is 8. Find it's common difference.


-2
-1
1
2​

Answer 1

Explanation:

Its given that first term is -2 ,i.e.,a = -2

and that 8th term,i.e.,a + 7d = 0.

Putting the value of a as -2, we get 7d = 2

Now we have to find 15th term,i.e., a + 14d = -2 + 2.7d = -2 - 2.2 = 2 - 4 = -2

Thus, the 15th term is -2

Answer 2

Answer:

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