Write the first five terms of the arithmetic sequence define

Write the first five terms of the arithmetic sequence defined recursively.

a₁ = 5,   a_{n + 1} = a_n + 5

a₁ =

a₂ =

a₃ =

a₄ =

a₅ =

Solution

a1 = 5

a_{n + 1} = a_n + 5

a2 = a1 + 5 = 10

a3 = a2 + 5 = 15

a4 = a3 + 5 = 20

a5 = a4 + 5 = 25