Please give answer for the question given above...
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1.a) Solution:- a= 1
d=2-1
=1
Sn= n/2[2a+(n-1)d]
= 10/2[2×1+(10-1)1]
= 5[2+9]
= 5[11]
= 55
So, Sn=55
I don't know the second one..sorry..
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HERES YOUR ANSWER
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HOPE IT HELPS U DEAR
SORRY I ALSO DONT KNOW THE SECOND THEORY
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