??????? kan yu sae "geometrik progresshun" ????????????
"that the 4th & 5fth terms is -108"
me first ges is SUM av term4 & term5=-108
sins x(5) +x(6)=+324, kinda look like raesheeo is negativ
terms go + - + -
& size av sum gro, impli abs(raesheeo) >1
from tri & tri, me thank mi find anser
raesheo=-4
term(4)=36, term(5)=-144, term(6)=+576
then term(3)=36/(-4)=-9
term(2)=-9/-4=+(9/4)
term(1)=-9/16