a GP is such

that the 4th and 5th terms is -108 and the sum of the 5th and 6th terms is 324 calculate the common ratio and the value of the 1st term
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1 Answer

??????? 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
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