The Student Room Group

Solving Inequalities

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Original post by zed963
So for this questions what happens to the signs

Sign.gif


Did you read my post? You should be able to find out if so.
Original post by zed963
So for this questions what happens to the signs

Sign.gif


you'd split the inequality into two inequalities and because you're dividing by a negative in each one they flip
Reply 22
Original post by pseudonymegg
you'd split the inequality into two inequalities and because you're dividing by a negative in each one they flip


In the book the signs do not flip its only the numbers that flip

The book states that the answer is

Sign.gif
Original post by pseudonymegg
you'd split the inequality into two inequalities and because you're dividing by a negative in each one they flip


You don't need to split it.
Original post by zed963
In the book the signs do not flip its only the numbers that flip

The book states that the answer is

Sign.gif


They do flip.

1x54-1 \leq x \leq \dfrac{5}{4} is the same as 54x1\dfrac{5}{4} \geq x \geq -1
Original post by zed963
In the book the signs do not flip its only the numbers that flip

The book states that the answer is

Sign.gif


doesn't matter whether it's the numbers or signs which flip, you get the same result
Reply 26
Original post by Lord of the Flies
They do flip.

1x54-1 \leq x \leq \dfrac{5}{4} is the same as 54x1\dfrac{5}{4} \geq x \geq -1


Ohh damn,

I'm making a lot of simple mistakes that I should avoid,

I guess I'll call it a day but thanks for correcting my mistakes everyone.
Original post by Lord of the Flies
You don't need to split it.


eek, yeah sorry

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