## abz_tech 3 years ago f(x)' √x(2x+4)

$\sqrt{x}(2x+4) \ \ or \ \ \sqrt{x(2x+4)}$

2. abz_tech

first one

First can you try it out by yourself?

Use the product rule

5. abz_tech

hmm i got : $2√x + 1/2√x(2x+4)$

6. abz_tech

dunno how to go from there =/

Yes thats Right!!! :) Hope you understood :)

You can simplify it , 1second ..

$2\sqrt{x}+ \frac{(2x+4)}{\sqrt{2x}}=\frac{2\sqrt{x}}{1}+ \frac{(2x+4)}{2\sqrt{x}}$$\frac{2\sqrt{x}\times 2\sqrt{x}}{1\times 2\sqrt{x}}+ \frac{(2x+4)}{2\sqrt{x}}=\frac{4x}{2\sqrt{x}}+ \frac{(2x+4)}{2\sqrt{x}}$$\frac{(4x+2x+4)}{2\sqrt{x}}= \frac{(6x+4)}{2\sqrt{x}}$Now factor out 2 from 6x+4 6x+4 =2(3x+2)$\frac{2(3x+2)}{2\sqrt{x}}= \frac{(3x+2)}{\sqrt{x}}$

10. abz_tech

0_o

If you want you can rationalise $\frac{(3x+2) \times \sqrt{x}}{\sqrt{x} \times \sqrt{x}} = \frac{\sqrt{x}(3x+2)}{x}$$\frac{\sqrt{x}3x}{x}+\frac{2\sqrt{x}}{x}= 3\sqrt{x}+ \frac{ 2}{\sqrt{x}}$

12. abz_tech

thx diya.. omg that was kinda easy -.-.. can't belive didn't get that -.-

lol Take your time :) Is there any step which you didn't follow ?

No problem ,You're Welcome :)

15. abz_tech

poke u later when im stuck.. kinda ok for now :p