differentiate this please (1 Viewer)

Menomaths · Oct 30, 2013

1/2sqrt(x) - 1

Are you testing us?

Drongoski · Oct 30, 2013

Menomaths said:
1/2sqrt(x) - 1

Are you testing us?

No - I actually got an answer very different from the book's. So I need help to resolve this. Should be very easy.

Menomaths · Oct 30, 2013

Drongoski said:
No - I actually got an answer very different from the book's. So

Oh never mind you changed the question haha

HeroicPandas · Oct 30, 2013

i got $\frac{1-2\sqrt{x}}{4\sqrt{x}\sqrt{\sqrt{x}-x}}$

Parvee · Oct 30, 2013

I think you just let u= sqrt(x)-x and it should work out

EDIT: got the same answer as wolfram from doing this

http://www.wolframalpha.com/input/?i=derivative+of+sqrt(sqrt(x)-x)

Drongoski · Oct 30, 2013

HeroicPandas said:
i got $\frac{1-2\sqrt{x}}{4\sqrt{x}\sqrt{\sqrt{x}-x}} = \frac{1}{4}\cdot \frac{\sqrt{x}-2}{x^{\frac{5}{4}}\sqrt{1-\sqrt{x}}}$

Thanks Heroic. I got the same answer as your 1st part. Book's answer:

$\frac {3x^2(2-\sqrt x)}{2 (1-\sqrt x)^4}$

Maybe the book, just released last year, has not been fully debugged.

Edit
Thanks everyone for your input.

enigma_1 · Dec 15, 2013

What book is this?

The new Fitzpatrick?

differentiate this please (1 Viewer)

Drongoski

Well-Known Member

Menomaths

Exaı̸̸̸̸̸̸̸̸lted Member

Drongoski

Well-Known Member

Menomaths

Exaı̸̸̸̸̸̸̸̸lted Member

HeroicPandas

Heroic!

Parvee

(╯°□°）╯︵ ┻━┻

Drongoski

Well-Known Member

enigma_1

Miss Cricket

Users Who Are Viewing This Thread (Users: 0, Guests: 1)

differentiate this please (1 Viewer)

Well-Known Member

Exaı̸̸̸̸̸̸̸̸lted Member

Well-Known Member

Exaı̸̸̸̸̸̸̸̸lted Member

Heroic!

(╯°□°）╯︵ ┻━┻

Well-Known Member

~~~~ Miss Cricket ~~~~

Users Who Are Viewing This Thread (Users: 0, Guests: 1)

Miss Cricket