Question

2. In an AP, the first term is -4, the last term is 29 and the sum of all its terms is 150. Find its common difference.

GN ^_^​

Answer 1

Answer:

GN

Step-by-step explanation:

a = 2

l = 29

Sn = 155

Sn = n/2 (a+1)

155 = n/2 (2+29) = 31 n/2

n = 155 x 2 / 31 = 10

: – l = a + (n-1) d

29 = 2 + (10-1) d

27 = 9 d

Hence , d = 3

Answer 2

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