Question

6. Find the sum of the integers between 100 and 200 that are: (i) divisible by 3
(ii) not divisible by 3.
ns.​

Answer 1

Answer:

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

Sn = 33/2 ( 102 +( 32) 3)

Sn= 33/2 ( 102 + 96 )

Sn = 33/2 ( 198 )

Sn = 33*99

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