Question

The nth term of an AP is 7 – 4n. Find its common difference.

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Answer 1

Step-by-step explanation:

Given,

n th term of an AP is 7-4n

=> an = 7-4n

=> a1 = 7 - 4(1) = 7-4 = 3

=> a2 = 7- 4(2) = 7-8 = - 1

d= a2 - a1 = - 1 - 3 = - 4

=> d = - 4

Answer 2

Answer:

The nth term of an AP is 7 – 4n. Find its common difference.