Question

Here a=1 d=. tn=149
tn=a+.
149=2n-.
n=. ​

Answer 1

a = 1

d = 3 - 1 = 2

tn = 149

Formula

tn = a + ( n - 1)d

149 = 1 + (n - 1)2

148 = (n - 1) 2

n = 75

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N = 75