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#1
No idea why I'm getting this wrong.. but..

Yet when I put it into autograph I get this:

What gives? >.<
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5 years ago
#2
Should be a combined inequality since it's less than/equal to zero
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#3
(Original post by Jackasnacks)
Should be a combined inequality since it's less than/equal to zero
So yeah I consulted my book and you're right, silly mistake... Is it correct that I have to interpret the type of symbol such as from a geometrical look at f(x)? Cannot it be done purely algebraically?
0
5 years ago
#4
(Original post by SamKeene)
So yeah I consulted my book and you're right, silly mistake... Is it correct that I have to interpret the type of symbol such as from a geometrical look at f(x)? Cannot it be done purely algebraically?
If you don't want to use the graph, consider the various cases that arise seperately. Here it would be x>=3, -6<=x<=3, x<=-6.
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5 years ago
#5
(Original post by SamKeene)
So yeah I consulted my book and you're right, silly mistake... Is it correct that I have to interpret the type of symbol such as from a geometrical look at f(x)? Cannot it be done purely algebraically?
Well yes but a quick 3 second sketch of the graph shows whether it's above/below axis
It should then be clear whether it's two separate equalities or a combined one
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5 years ago
#6
(Original post by SamKeene)
So yeah I consulted my book and you're right, silly mistake... Is it correct that I have to interpret the type of symbol such as from a geometrical look at f(x)? Cannot it be done purely algebraically?
Yes - if you want a result that is negative then the brackets must have opposite signs.
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5 years ago
#7
(Original post by SamKeene)
No idea why I'm getting this wrong.. but..

A minor point: here you can write directly, which removes the need for factorisation.
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