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Use the sequence below
to complete each task.
3, -15, 75, ...
a. Identify the common ratio (r).
b. Write an equation to represent
the sequence.
C. Find the 5th term (a5)

Respuesta :

devishri1977

Answer:

Step-by-step explanation:

3 , -15 , 75 ......

Common ratio (r)= second term ÷ first term

                       = -15 ÷ 3

                        = -5

[tex]b) n^{th} \ term = a*r^{n-1} \\\\ t_{n}= 3*(-5)^{n-1}[/tex]

[tex]c) t_{5}= 3*(-5)^{5-1}\\\\\\ = 3*(-5)^{4}\\\\= 3* 625\\\\= 1875[/tex]

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