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IceJOKER [234]
3 years ago
14

A sequence is defined by the following:

Mathematics
2 answers:
katrin2010 [14]3 years ago
6 0

Answer:

Step-by-step explanation:

a1 = 6

a2 = -1.2*a_(n-1)

a2 = -1.2*a_1

a2 = -1.2 * 6

a2 = -7.2

a3 = -1.2*a_(n-1)

a3 = -1.2*a_2

a3 = -1.2 * - 7.2

a3 = 8.64

a4 = -1.2 * a_3

a4 = -1.2 * 8.64

a4 = -10.368

AleksandrR [38]3 years ago
5 0

Answer:  The correct option is (B) -10.368.

Step-by-step explanation:  Given that a sequence is defined b the following :

a_1=6,~~~a_n=-1.2a_{n-1}.

We are to find the 4-th term.

To find the fourth term, we need to start from finding the first term.

If n = 2, then the second term is given by

a_2=-1.2\times a_1=-1.2\times 6=-7.2.

If n = 3, then the third term is given by

a_3=-1.2\times a_2=-1.2\times (-7.2)=8.64.

If n = 4, then the fourth term is given by

a_4=-1.2\times a_3=-1.2\times 8.64=-10.368.

Thus, the fourth term of the given sequence is -10.368.

Option (B) is CORRECT.

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