Write the first 5 terms of the sequence

Question

a0=1

an=an-1-2

have to find the first five terms

Answer 1

So sequences have a common difference between numbers. If the first number is 1 and then next the number is -1, then the common difference is -2.

In this case, we start with 1 (a₀ means the zero number of the sequence). To find the next number in the sequence, a_n, we take the previous number, a_n-1, and subtract 2.

a₀ = 1

a_n = a_n-1 - 2

Thus,

a₀ = 1

a₁ = -1

a₂ = -3

a₃ = -5

a₄ = -7

a₅ = -9