Find the sum of first 10 terms of the A. P.

4 + 6 + 8 + ...............

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Solution

D= 2
a = 4
l = 10th term =a+9d=4+18=22
Sum of 10 terms =[ 4 + 22] × 10/2
=> 26×5
=> 130

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Find the sum of first 10 terms of the A. P. 4 + 6 + 8 + ...............

D= 2 a = 4 l = 10th term =a+9d=4+18=22 Sum of 10 terms =[ 4 + 22] × 10/2 => 26×5 => 130

Find the sum of first 10 terms of the A. P.

4 + 6 + 8 + ...............

D= 2
a = 4
l = 10th term =a+9d=4+18=22
Sum of 10 terms =[ 4 + 22] × 10/2
=> 26×5
=> 130