plss help me with this question it's urgent
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Step-by-step explanation:
(4 - 1/n) + (4- 2/n) + ( 4- 3/n) + .....
= (4+4+4+....) - (1/n + 2/n + 3/n + .....)
= 4(1+1+1....) - 1/n (1+2+3+....)
=4 (n) - 1/n × n(n+1)/2
=4n - (n+1)/2
=8n-n-1/2
=7n-1/2
=1/2(n+1)
hope this will help you
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