Question

find the sum of 10 terms ap is 2, 7,12

Answer 1

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Answer 2

Hey...!! HERE IS YOUR ANSWER...!!

S10 =n/2 ( 2a + ( n - 1 ) d )
= 10/2 ( 2×2 + ( 10 - 1 ) 5 )
= 5 ( 4 + 45 )
= 5 ( 49 )
= 245...... ANS.........