Question

In an A.P , if a1 = - 2, d = 5, sn = 568, then find 'n' , 'l'​

Answer 1

Answer:

n=16, l= 73

Step-by-step explanation:

use Formula Sn= n/2 (2a+(n-1)d)

and l=a +(n-1)d

Answer 2

Answer:

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