Question

determine o numero de termo da p.a (2,10,18,.....250) usando a formila

Answer 1

an = a1 + ( n-1 ) . r

250 = 2 + (n-1) .8

250 = 2 + 8n - 8

250 = 8n - 6

250 + 6 = 8n

8n = 256

n = 256/8

n = 32 termos           ok