5,9,13,17 sum of 20 terms of this A.p.is
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Answered by
7
Answer:
1st term = 5
c.d = 9-5=4
therefore sum upto 20 terms= 20/2 [ 2a+(n-1)d]
= 10( 10+95)
= 10×105
= 1050
Answered by
10
Answer:
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