strictly decreasing

**ibnashraf** · December 9th 2009, 02:50 PM

Question: Which of the following functions is strictly decreasing for $x\in\Re$ ?

(a) $f(x)=x^2$

(b) $f(x)=-x$

(c) $f(x)=\sqrt{x}$

(d) $f(x)=2-x^2$

**skeeter** · December 9th 2009, 03:03 PM

Originally Posted by ibnashraf

Question: Which of the following functions is strictly decreasing for $x\in\Re$ ?

(a) $f(x)=x^2$

(b) $f(x)=-x$

(c) $f(x)=\sqrt{x}$

(d) $f(x)=2-x^2$

did you look at the graphs of these functions?

**millerst** · December 9th 2009, 06:35 PM

The answer is (b), $f(x)=-x$ ... but if you don't understand this I think you need to invest time into understanding the graphs and what it means to have a decreasing function...

Thread: strictly decreasing

LinkBack

Thread Tools

Display

strictly decreasing

Similar Math Help Forum Discussions

strictly monotonic

Prove that f is strictly increasing

strictly monotonic

Show strictly monotone

Is every strictly locally monotone sequence strictly monotone?

Search Tags