Need help, multiple choice

Option A.

Step-by-step explanation:

While proving a number to be irrational, we usually start with the assumption that the number is rational . In the same way here , we will assume the opposite of the inequation to be proved , that is, x < 3 .

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

the two may have that, even a breakdown is probably offered