Question

dada a PA (28, 36, 44, 52, ...), determine seu:
a) oitavo termo b) décimo termo c)vigésimo nono termo d) a17 e a21

Answer 1

primeira ache a razão r
r= 36-28=8
a) a8=a1+7.r=28+7.8=28+56=84
b)a10=a1+9r=28+9.8=28+72=100
c)a29=a1+28r=28+28.8=28+224= 252
d)a17=a1+16r=28+16.8=28+128=156
f)a21=28+20.8=28+160=188