Part A Write the explicit formula in function form.
an = 5 +0.2(n - 1)
f(n) =

Part b
What is the y-intercept of the function

A.  

B. The y intercept is 4.8

Step-by-step explanation:

Given

Solving (a): Write as a function.

To do this, we simply substitute f(n) for

becomes

Open Bracket

Collect Like Terms

B. The y intercept.

To get the y intercept, we set n to 0

i.e

Hence, the y intercept is 4.8

(n^3 - n)

= n(n-1)(n+1)

since it is divisible by 3 and 2 ,because it is a multiple 3 consecutive number

if, n-1 is odd then n+1 is also odd, then it is a multiple of 9

but if, n-1 is even then n+1 is also even, then it is a multiple of 4

so, largest multiple = max(9*2, 4*3) = max(18, 12) = 18

i dont know

step-by-step explanation: