Question

So basically, "Write down in terms of n, an expression for the nth term of the following sequences:

a) 12 10 8 6 4 2
b) 25 20 15 10 5

Answer 1

Answer:

a )   2 ( 7-n )

b )   5 ( 6-n )

Step-by-step explanation:

a )  a+(n-1)d

   = 12+ (n-1)-2

   = 12-2n+2

   = 14-2n

   = 2(7-n)

b )a+(n-1)d

   =25+ (n-1)-5

   = 25-5n+5

   = 30-5n

   = 5(6-n )