Stentembrownparkee Stentembrownparkee

19-07-2016
Mathematics

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fill in the missing term in the geometric sequence. -1, 4, -16, ____, -256

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dalendrk dalendrk

24-07-2016

[tex]a_1=-1;\ a_2=4;\ a_3=-16;\ a_4=?;\ a_5=-256\\\\a_3:a_2=r\to r=-16:4=-4\\\\a_4=a_3r\to a_4=-16\cdot(-4)=64\\\\Answer:\boxed{64}[/tex]

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