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Calc II
Use the comparison or limit comparison test to decide if the following series converge. Series from n=1 to infinity of (4sin n) / ((n^2)+1) and the series from n=1 to infinity of (4sin n) / ((2^n) +1). For each series which
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find the sum of the series: 1. the sum from n=1 to infinity of ((1)^n*(.2)^n)/n I simplified this to: (.2)^n/n I know this is alternating, but how do I know what the sum is? 2. the sum from n=0 to infinity of 1/2^n Is this
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1)Find a1 in a geometric series for which Sn=300,r=3,and n=4 A)15 B)15/2 C)15 D)1/15 I chose A 2)Find the sum of the infinite geometric series. Sigma sign with infinity symbol above and n=1 below. To the right 20(1/4)n1 A)25
asked by Jon on December 12, 2007 
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1)Find a1 in a geometric series for which Sn=300,r=3,and n=4 A)15 B)15/2 C)15 D)1/15 I chose A 2)Find the sum of the infinite geometric series. Sigma sign with infinity symbol above and n=1 below. To the right 20(1/4)n1 A)25
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Another problem: determine whether the series is convergent if so find sum it is the sum from k=1 to infinity of ((1)^k)/(3^(k+1)) i found this series to be geometric where a=1/9 and r=1/3 my answer was converges to 1/6
asked by sarah on February 21, 2008 
calculus
determine whether the series is convergent if so find sum it is the sum from k=1 to infinity of ((1)^k)/(3^(k+1)) i found this series to be geometric where a=1/9 and r=1/3 my answer was converges to 1/6
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A geometric series has a positive common ratio of r. The series has a sum to infinity of 9 and the sum of the first two terms is 5. Find the first four terms of the series.
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The three real,distint and nonzero numbers a,b,c are such that a,b,c are in arithmetic progression and a,c,b are in geometric progression. Find the numerical value of the common ratio of the geometric progression.. Hence,find an
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Determine the convergence of the following series using the nthpartial sum or geometric series formula. The sum of n=1 to inifitiy 1/(9n^2+3n2) How do I start? I'm guessing I should factor out the denominator but whats after
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