ICSE & CBSE Board Question Based on Arithmetic Progression of RS Aggarwal
Here the two term of AP is given and you have to find the sum to n terms.
This is the Question Number 17 Of Exercise 11 C of RS Aggarwal Solution.
Deepak BoraNewbie
Find the sum of 51 terms of the AP whose second term is 2 and the 4th term is 8.
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a + d = 2
a +3d = 8
2d = 6
d = 3
a+3 = 2
a = -1
51 term = -1 + 50×3 = 149
Sum = (51/2)(-1+149)
= 51× 74
= 3774