Question

determine a razao e classifique cada p.a (3,8,13,18,.....) (-3,-8,-13,-18,.....) (2,-1,-4,-7,...) (-12,-7,-2,3,.....) (8,8,8,8,.....)

Answer 1

r =8-3
r =5 P.A crescente

r = -8-(-3)
r = -8+3
r = -5 decrescente


r = -1-3
r = -4 decrescente

r =-7-(-12)
r = -7+12
r = 5 decrescente

r = 8-8
r = 0 estacionária