Question

In an AP ,a=5,d=3,an=50then n=.?

Answer 1

$a_n = a+ (n-1)d\\\\\implies 50 = 5 + (n-1) 3 \\\\\implies 50 = 5+ 3n-3 \\\\\implies 50 = 3n+2 \\\\\implies 3n = 48 \\\\\implies n = \dfrac{48}{3} = 16$

Answer 2

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