4+7+ 10 + 13 +...... Sum of the 12 terms of this A. P.is and also find all 12 terms of AP
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Answer:
12th term of AP = 37 , Sum of the 12 terms of this A. P. = 246
Step-by-step explanation:
In this AP 4+7+10+13+.....
a = 4 , n = 12 , d = 7-4 = 3
so, 12th term l = a + (n-1)d
l = 4 + (12-1)3 = 4 + 11×3 = 4 + 33 = 37
sum of the 12 terms S =n/2 (a+l)
S = 12/2 (4 + 37)
S = 6 × 41 = 246
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