∑ ( 1/( (5i)^n + n) )

∑ ( 1/( (5i)^n + n) )

∑(sqrt(n+2) - 2sqrt(n+1) + sqrt(n))

the sum of two numbers is 20. one is three more than the other. What are the numbers?

Thank you in advance!💙

Thank you in advance!💙

this sum only includes three numbers

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please help I have no idea what this means and I need the work to show how to do it

Calculate S3,S4, and S5 and then find the sum for the telescoping series S=∑(1/n+1−1/n+2),n=0..infinity S3 = S4 = S5 = S =

2cosx - secx = cosx - tanx/cscx

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