3 years ago

If a1 = 7 and an = An-1 – 3 then find the value of a4.

Mathematics

1 answer:

V125BC [204]3 years ago

8 0

Answer:

-2

Step-by-step explanation:

If a1 = 7 and an = An-1 – 3

a4 = a3 - 3

Get a2;

a2 = a1 - 3

a2 = 7 - 3

a2 = 4

Get a3;

a3 = a2 - 3

a3 = 4 - 3

a3 = 1

GEt the required a4

a4 = a3 - 3

a4 = 1 - 3

a4 = -2

Hence the value of a4 is -2

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