Question

Determine o nonigentésimo termo da P.A (-5,-11,-17...)​

Answer 1

r = A2 - A1

r = - 11 - (-5)

r = -11 + 5

r = -6

An = A1 + (n-1) . r

A900 = -5 + (900-1) . -6

A900 = -5 + 899 . -6

A900 = -5389