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question

Daniel S · 2011-10-18 13:43:40

Can't remember how to simplify this, can someone help: (1/x)/(1/x + 1) 1 x1 + 1 x Is it: 11 + x ?

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18-10-2011 2:43pm

#1

Daniel S

Registered Users Posts: 3,525 ✭✭✭

Join Date: April 2010

Posts: 3236

Can't remember how to simplify this, can someone help:

(1/x)/(1/x + 1)

1
x
1 + 1
x

Is it:

1
1 + x

?

0

Comments

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#2 18-10-2011 3:19pm
Fremen

Registered Users Posts: 2,481 ✭✭✭

Join Date: May 2006

Posts: 2356

Daniel S wrote: »

Is it:

1
1 + x

?

You tell me.

To multiply fractions, you use

(a/b) times (c/d) = ac/bd.

The trick here is to multiply (1/x)/(1/x + 1) by 1 in a clever way.

x/x = 1, so what's

(1/x)/(1/x + 1) times x/x?

0
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#3 18-10-2011 3:30pm
Daniel S

Registered Users Posts: 3,525 ✭✭✭

Join Date: April 2010

Posts: 3236

Fremen wrote: »

You tell me.

To multiply fractions, you use

(a/b) times (c/d) = ac/bd.

The trick here is to multiply (1/x)/(1/x + 1) by 1 in a clever way.

x/x = 1, so what's

(1/x)/(1/x + 1) times x/x?

Thanks!

0
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#4 19-10-2011 8:57am
PaulieBoy

Registered Users Posts: 534 ✭✭✭

Join Date: April 2006

Posts: 510

It's easy to check your answer, just let x=something and check!

0