5. (i) Find the sum of the first 1000 positive integers.
(ii) Find the sum of the first n natural numbers.
(iii) Find the sum of the first n odd natural numbers. 12
(iv) Find the sum of the first n even natural numbers.
6. (i) Find the sum of first 8 multiples of 3.
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please give the limits also.....
for n
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