Question

3. Find the common difference for an AP if t3 = 8 and = 12​

Answer 1

Answer:

Using AP formula,

t3 = 8 , a. = 12

tn = a + (n-1) x d ( TN mean t3)

8 = 12 + (8-1) x d

8 = 12 + 7 x d

8 = 19 x d

d = 19 -8

d = 11

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