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Grade: 11
        Solve the following question with step by step solution
one year ago

Answers : (1)

Arun
22807 Points
							
Find nth term
Tn = 1/(5n-4)(5n +1)
 
= 1/5(5n-4) - 1/5(5n+1)
 = 1/5 [1/(5n-4) - 1/(5n+1)]
 
Now 
Put value n = 1 ,2 ,3......n
 
And then add 
Only two terms will remain
 
Sn = 1/5 [1 - 1/(5n +1)]
 
 
Regards
Arun (askIITians forum expert)
one year ago
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