Arithmetic sequence????
Given the arithmetic sequence below find a_k
1250, a_k, a_k+1, 50
Is it 175, 900, 525, or 1075
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Given the arithmetic sequence below find a_k
1250, a_k, a_k+1, 50
Is it 175, 900, 525, or 1075
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Verified answer
1250 + d(n-1) = 50
50 is the 4th term so n is 4.
1250 + d(3) = 50
d = -400
a_k is the 2nd term, so n is 2. 1250 + -400(2-1) = 850.
I don't think that any of your answer choices are right.
a = 1250
4th term = 1250+(4-1)d = 50
d = -400
Sequence is
1250, 850, 450, 50
a_k = 850