The question is attached above, Please send the complete step by step solution.

Asked by sudhanshubhushanroy | 20th Nov, 2017, 08:14: AM

Expert Answer:

begin mathsize 16px style sum from straight r equals 1 to straight n of fraction numerator straight r over denominator open parentheses straight r plus 1 close parentheses factorial end fraction
equals sum from straight r equals 1 to straight n of fraction numerator begin display style straight r plus 1 minus 1 end style over denominator begin display style open parentheses straight r plus 1 close parentheses factorial end style end fraction
equals sum from straight r equals 1 to straight n of open parentheses fraction numerator 1 over denominator straight r factorial end fraction minus fraction numerator 1 over denominator left parenthesis straight r plus 1 right parenthesis factorial end fraction close parentheses
substitute space the space values space straight r equals 1 comma 2 comma...... straight n
end style

Answered by Arun | 30th Nov, 2017, 09:54: AM