Find the length of arc AB B
15 cm
132
A
Length of arc AB in terms of a
cm
Length of arc AB rounded
cm
-
Round to two decimal places.

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

answer: 0.64

step-by-step explanation:

i saw this question before, dont know the asnwer srry

step-by-step explanation: