The first five terms of a sequence are 5, 4, 3, 2, 1. What is the explicit formula for the sequence?
A. [tex]an=n-6[/tex]
B. [tex]an=5-n[/tex]
C. [tex]an=6-n[/tex]
D. [tex]an=n-5[/tex]

Respuesta :

Answer:

The explicit formula for the sequence is:

                Option: C

               C. [tex]a_n=6-n[/tex]

Step-by-step explanation:

We are given first five terms of a sequence as:

      5,4,3,2,1

i.e. if [tex]a_n[/tex] represent the nth term of a sequence then we have:

[tex]a_1=5\\\\a_2=4\\\\a_3=3\\\\a_4=2\\\\a_5=1[/tex]

Hence, the rule that follows for the terms of the sequence is:

       C. [tex]a_n=6-n[/tex]

Since when n=1 we have:

[tex]a_1=6-1\\\\a_1=5[/tex]

when n=2 we have:

[tex]a_2=6-2\\\\a_2=4[/tex]

when n=3 we have:

[tex]a_3=6-3\\\\a_3=3[/tex]

when n=4 we have:

[tex]a_4=6-4\\\\a_4=2[/tex]

when n=5 we have:

[tex]a_5=6-5\\\\a_5=1[/tex]

Answer:

C

Step-by-step explanation: