Question

find the number of term in a.p 5,7,9.....23?​

Answer 1

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Answer 2

Answer:

a=5 d=2

a(n) = 23

a(n) = a + (n-1) d

23= 5+ (n-1) 2

23-5 = 2n-2

(cutted) 18 = (cutted) 2 (n-1)

9= n-1

n=10