Question

the 9th term of A,P is 7 - 4n then the common difference is​

Answer 1

Answer:

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Answer 2

Nth term = an = 7-4n

first term = a1 = 7-4(1) = 7-4 = 3

second term = a2 = 7-4(2) = 7-8 = -1

second term - first term = a2 - a1

= -1-3 = -4

Therefore common difference(d) = -4