Question

If sequence s has 240 terms, what is the 239th term of s ? (1) each term of s after the first term is 4 less than the preceding term. (2) the 239th term of s is 952 less than the first

Answer 1

$x_{n}$ = a₁ + d(n - 1)  ; where "a₁" is the first term and "d" is the difference

a₂₄₀ = a₁ + d(240 - 1)

a₂₄₀  = a₁ + 239d