Find the 4th term in the sequence with the following definition:

a(1) = 0

a(n) = 2(a(n-1) -3)



Tip; (1 , n , & n-1 are to the power below if that makes sense , usually it’d say a^n but there should be an arrow pointing down)

so, a (down arrow) n-1 is my example

Find the 4th term in the sequence with the following definition a1 0 an 2an1 3 Tip 1 n amp n1 are to the power below if that makes sense usually itd say an but class=

Respuesta :

Answer:

-42

Step-by-step explanation:

[tex]a_{1}  = 0\\a_{2}  = 2(0-3) = -6\\a_{3}  = 2(-6-3) = -18\\a_{4}  = 2(-18-3) = -42[/tex]

The fourth term in the sequence, with the following definition in which the value of the first term is 0, is -42.

What is geometric sequence?

Geometric sequence is the sequence in which the next term is obtained by multiplying the previous term with the same number for the whole series.

The sequence given as,

[tex]a_{1} = 0\\a_{n} = 2(a_{n-1} -3)[/tex]

In this expression, n represent the number of term. The first term is zero. Thus, the second term of the sequence is,

[tex]a_{2} = 2(a_{2-1} -3)\\a_{2} = 2(a_{1} -3)\\a_{2} = 2(0 -3)\\a_{2} = -6[/tex]

Third term is,

[tex]a_{3} = 2(a_{3-1} -3)\\a_{3} = 2(a_{2} -3)\\a_{3} = 2(-6 -3)\\a_{3} = -18[/tex]

Similarly, the fourth term is,

[tex]a_{4} = 2(-18 -3)\\a_{2} = -42[/tex]

Hence, the fourth term in the sequence with the following definition in which the value of the first term is 0, is -42.

Learn more about the geometric sequence here;

https://brainly.com/question/1509142