Q. Does the infinite geometric series converge or diverge?1+4+16+64+…Choices:(A) converge(B) diverge
Find Common Ratio: To determine if the infinite geometric series converges or diverges, we need to find the common ratio r of the series.The common ratio is found by dividing any term in the series by the preceding term.For this series, we can use the second term 4 and the first term 1 to find the common ratio.r=14=4
Check Convergence Criterion: An infinite geometric series converges if the absolute value of the common ratio is less than 1 (|r| < 1).Since we found that r=4, we can see that ∣r∣=∣4∣=4, which is not less than 1.Therefore, the series does not meet the convergence criterion.
Series Diverges: Since the common ratio is greater than 1, the series diverges.The terms of the series will continue to grow larger without bound, and the sum of the series cannot approach a finite number.
More problems from Convergent and divergent geometric series