Well you've got a square root there, so since both sides of your inequality are non-negative, I'd start by squaring them. A little bit of thinking from there may show you how the proof is done.

Reply 5

Concav

Original post by ghostwalker

Well you've got a square root there, so since both sides of your inequality are non-negative, I'd start by squaring them. A little bit of thinking from there may show you how the proof is done.

THAnks mate i love you can i ask you another

Reply 6

ghostwalker

Original post by Concav

THAnks mate i love you can i ask you another

As long as you've thought about it for a while.

Reply 7

Concav

Original post by ghostwalker

As long as you've thought about it for a while.

I have its just ive been so inactive with maths for a while.
How do i do

| \dfrac{a}{b} + \dfrac{b}{a} | \geq 2

Ive added both fractions but thats about it

a, b not 0

(edited 7 years ago)

Reply 8

ghostwalker

Original post by Concav

I have its just ive been so inactive with maths for a while.
How do i do

| \dfrac{a}{b} + \dfrac{b}{a} | \geq 2

Ive added both fractions but thats about it

a, b not 0

Once you know how to do it, it's quite simple. But doesn't really help the learning process to just come out with it. So, again, I'll try and point in the general direction.

So, you have the sum of two fractions. First thing I'd do is get a common denominator. Then use what you know about division and multiplication of modulii, to rearrange it into an equivalent form without the fractions.

Then have a think about the resulting equation.

PS: Post again if you need further assistance.

(edited 7 years ago)