Find the sum of 51 term of the ap whose second term is 2 and the 4th term is8
Answers
Answered by
6
Answer:
3774
Step-by-step explanation:
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
Answered by
1
Answer:
hey :)
Step-by-step explanation:
//Answer//
Step-by-step explanation:
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
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