Without using the derivative, show that the function `f(x)=|x|` is strictly increasing in `(0,oo)` strictly decreasing in `(-oo,0)dot`

Without using the derivative,show that the function f(x)=|x| is (a) strictly increasing in (0,oo)( b) strictly decreasing in (-oo,0)

Without using the derivative, show that the function f(x)=|x| is (a) strictly increasing in (0,\ oo) (b) strictly decreasing in (-oo,\ 0)

Without using the derivative, show that The function f(x) = 5-7x is strictly decreasing on R

Without using the derivative, show that The function f(x) = 3x + 7 is strictly increasing on R

Without using the derivative show that the function f(x)=7x-3 is strictly increasing function on R.

Without using the derivative show that the function f(x)=7x-3 is strictly increasing function on R.

Without using the derivative show that the function f(x)=7x-3 is strictly increasing function on Rdot

Without using the derivative show that the function f(x)=7x-3 is strictly increasing function on R .

Show that the function f(x ) = |x| is (a) striclty increasing on [0, oo] (b) strictly decreasing on [-oo, 0]

Show that the function f(x)=x^2 is neither strictly increasing nor strictly decreasing on R .