Question

Find the sum of the : 4. 50 terms of the A.P. 1, 2, 3, ...​

Answer 1

Answer:

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Answer 2

Here is your answer. Do crosscheck. You can also use n/2( a+l ) formula. Where a = 1 and l = 50

= 50/2( 1+50 )

= 25( 51 )

= 1275

Either of the 3 ways are correct; use whatever is more convenient