Which number is written in scientific notation? 1. 4.5x 10^-3
2. 14.5x10^2
3.0.78x10^-6
4. 5.7x4^8

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

l.jnl.j/n.m,lm,

step-by-step explanation: