edsheeranswife113 edsheeranswife113

01-06-2016
Mathematics

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Give the first four terms of a geometric sequence having a1=18 and r = 2.

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01-06-2016

Hello,

[tex] a_{1}=9*2=18 [/tex]
[tex] a_{2}=9*2^{2}=36 [/tex]
[tex] a_{3}=9*2^{3}=72 [/tex]
[tex] a_{4}=9*2^{4}=144 [/tex]

[tex] a_{n}=9*2^{n} [/tex]

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