# In an AP: (i) given a = 5,d=3, a_n = 50, find n and S_n . (ii) given a = 7, a_(13) = 35, find d and S_(13) . (iii) given a_(12) = 37, d= 3,

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In an AP: (i) given a = 5,d=3, a_n = 50, find n and S_n . (ii) given a = 7, a_(13) = 35, find d and S_(13) . (iii) given a_(12) = 37, d= 3, find a and S_(12) . (iv) given a_3 = 15, S_(10) = 125, find d and a_(10) . (v) given d = 5, `S_
A. 5
B. 6
C. 7
D. 8

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