ellamai16 ellamai16
  • 10-12-2018
  • Mathematics
contestada

write the first five terms of the geometric sequence with a1=-2 and common ratio r=-5/2

write the first five terms of the geometric sequence with a12 and common ratio r52 class=

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lisboa lisboa
  • 10-12-2018

Answer:

option D

Step-by-step explanation:

First term is -2

common ratio = -5/2

To get second term we multiply first term -2  by common ratio -5/2

[tex]-2 * \frac{-5}{2} =\frac{10}{2} = 5[/tex]

To get third term we multiply second term 5  by common ratio -5/2

[tex]5 * \frac{-5}{2} =\frac{-25}{2}[/tex]

To get fourth term we multiply third term -25/2  by common ratio -5/2

[tex]\frac{-25}{2}*\frac{-5}{2} =\frac{125}{4}[/tex]

Option D is correct



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