Question
what is the both answer
Iva https://www.webassign.netweb/student/Assignment-Responses/submit?dep=171 - Consider the following series (cos 21)k (a) Determine whether the series is convergent or divergent. O convergent O divergent (b) If it is convergent, find its sum. (Otherwise enter DNE.) 0.51 points | Previous Answers SCalcCC4 8.2.028 Consider the following series 10.5)"-1-(0.4)"] (a) Determine whether the series is convergent or divergent. convergent O divergent (b) If it is convergent, find its sum. (Otherwise enter DNE.) Submit Answer Save Progress Practice Another Version 6. 0.51 points 1 Previous Answers SCalcCC4 8.2,029 Consider the following series 6 en n n+l
Explanation / Answer
as in both question series is geometric whose sum is a/(1-r) where a is first term and r is ratio between two consecutive terms
a) sum =cos(21)/(1-cos(21)) =-0.3539
b)sum = 1/(1-0.5) -0.4/(1-0.4) =2-2/3 =4/3 =1.3333
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