Question

5, 1, -3, -7, . . . Find the first term and common difference for each of the A.P.

Answer 1

5 , 1 , -3 , -7..........

a = 5
d = 1 - 5 = -4

Answer 2

Solution :

Given A.P is 5 , 1 , -3 , -7 , ....,

first term = a = a1 = 5 ,

second term = a2 = 1 ,

Common difference ( d ) = a2 - a1 = a3-a2

d = 1 - 5

d = -4

Therefore ,

first term = a = 5 ,

common difference = d = -4

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