lillyrose622 lillyrose622

10-03-2020
Mathematics

contestada

11/28 Marks
Write down in terms of n, an expression for the nth term
of the following sequences:
a) 12
10
8
6
4

Respuesta :

devishri1977 devishri1977

10-03-2020

Answer:

14 - 2n

Step-by-step explanation:

a = first term = 12

d = second term - first term = 8 - 10 = -2

nth term = a + (n-1)d

= 12 + (n-1)*(-2)

= 12 + n * (-2) - 1*(-2)

= 12 -2n + 2

= 14 - 2n

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