Q. Does the series converge or diverge?n=1∑∞2n1=21+41+81+161+⋯
Given series: We are given the infinite geometric series ∑n=1∞2n1. To find the sum of an infinite geometric series, we use the formula S=1−ra, where a is the first term and r is the common ratio.In our case, the first term a=21 and the common ratio r=21.
Formula application: Now we apply the formula for the sum of an infinite geometric series:S=1−ra=1−2121.
Simplify expression: Simplify the expression:S=2121=1.
Final result: The sum of the infinite series ∑n=1∞2n1 is 1.
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