A.P.2.5.8.11...... के 20वें और 25 वे पदो का योग निकालें।
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Given AP;
2, 5 , 8, 11 , ........
Therefore :
- a = 2
- d = +3
Thus by using an = a + (n-1)d
1) a20 = a + (20-1)d
(2) + (19)3
6 + 57
=> a20 = 63
2)a25 = a + (25-1)d
(2) + (24)3
6 + 72
=> a25 = 78
#answerwithquality
#BAL
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