an = n(n+2) For n = 1, a1 = 1(1 + 2) = 3 For n = 2, a2 = 2(2 + 2) = 8 For n = 3, a3 = 3(3 + 2) = 15 For n = 4, a4 = 4(4 + 2) = 24 For n = 5, a5 = 5(5 + 2) = 35 Thus first five terms are 3, 8, 15, 24, 35.

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Q. 15.0( 5 Votes )

Write the

Class 11th

Answer :

a_n = n(n+2)

For n = 1, a₁ = 1(1 + 2) = 3

For n = 2, a₂ = 2(2 + 2) = 8

For n = 3, a₃ = 3(3 + 2) = 15

For n = 4, a₄ = 4(4 + 2) = 24

For n = 5, a₅ = 5(5 + 2) = 35

Thus first five terms are 3, 8, 15, 24, 35.

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