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Which of the following sequences are convergent

Which of the following sequences are convergent-example-1

1 Answer

5 votes

Answer:

option A and E

Explanation:

Arithmetic sequence converge, only in the case only when r=0

otherwise , arithmetic sequence goes increasing or decreasing at a constant rate.

So we ignore second and fourth option

If |r|<1 then geometric sequence converge

if |r|>1 then geometric sequence diverge

In option A, r= 1/5 that is less than 1 so it converge

In option C, r= -2 , |r| > 1 so geometric sequence diverge

In option E, r= 2/3 that is less than 1 so it converges

Answer is option A and E




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