A.P is known for Arithmetic Progression whose common difference = a_n – a_n-1 where n > 0

a = a₁ = 3, a₂ = 5, l = 201

Common difference, d = a₂ – a₁ = 5 – 3 = 2

We know, n^th term from end, b_n = l – (n – 1)d where l is last term or a₁ and d is common difference and n is any natural number

∴ b₁₂ = 201 – (12 – 1)2

⇒ b₁₂ = 201 – 24 + 2

⇒ b₁₂ = 203 – 24

⇒ b₁₂ = 179

Hence, 12^thterm from end for the given A.P is 179