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Pre-calculus help!! Homework..?

I need help!! I have NO idea how to prove. Please help. I've been doing this for an hour already :(

Let N e R (Let any real number be..)

  1. For n≥3, prove that 2n^2≥ (n+1)^2

  2. For n>2, prove that (3n)/(n^2 +2) <1

  3. For n≥4, 2n^3 ≥ (n+1)^3

Answers (2)

harperdavide5d921 profile image
rol2b9btaa profile image

Just plug it in plug it in