Im not entirely sure what to do here can anyone explain it and tell me the answer

We have . By entering 3 we get because we enter again the function will apply further (will be recursive). .

Hope this helps.

14

Step-by-step explanation:

Plug in 3 in f(n).

f(3) = f(3−1) + 5.5

f(3) = f(2) + 5.5

We need to find f(2).  So plug in 2 in f(n).

f(2) = f(2−1) + 5.5

f(2) = f(1) + 5.5

f(2) = 3 + 5.5

f(2) = 8.5

Therefore:

f(3) = 8.5 + 5.5

f(3) = 14

hello from mrbilldoesmath!

answer:

a(n) - a(n-1) -3

discussion:

this ones a bit interesting. given a(n) = 5 - 3n consider this:

a(n-1) = 5 - 3(n-1)

          = (5 - 3n) + 3             => but a(n) = 5 - 3n, the first term

          = a(n)   + 3                 => subtract 3 from both sides

a(n-1) -3 = a(n)  

or

a(n) - a(n-1) -3

you,

mrb

3x + 18 = 147°

step-by-step explanation:

3x + 18 = 147°, because the value of the central angle is equal to the value of the arc formed by it.

i hope i you.