TrillTin1999 TrillTin1999

30-06-2016
Mathematics

contestada

in a geomatric sequence, a5= 36 and a7=16

Respuesta :

30-06-2016

Hello,

[tex] a_{5}=36 [/tex]
[tex] a_{6}=36*r [/tex]
[tex] a_{7}=36*r^2=16 [/tex]
==>r²=16/36=4/9

==>r=2/3 or r=-2/3

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