Question

Quantos termos tem a P.A.(252,254,....,300)

Answer 1

(252, 254, ..., 300)

a₁ = 252

an = 300

r = 254 - 252 ----- r = 2

an = a₁ + (n - 1) r ------ 300 = 252 + (n - 1) . 2 ------ 300 - 252 = (n - 1 ) . 2

48 = (n - 1 ) . 2 ----- n - 1 = 48/2 ----- n - 1 = 24 ----- n = 24 + 1 ---- n = 25