Q9 please

9) Use the Mean-Value Theorem to prove VI+x

9) Use the Mean-Value Theorem to prove 1+x 1+x/2 for all x 20. 10) Prove, disprove or sketch arguments pro- and con- the assertions: consider a A) iff(x) is monotone then i) F (x)= is i) defined for each x, and ii) B) iff(x) is continuous then i) F(x)= is i) defined for each x, and ii)