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partial fractions A level Maths c4
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Please could somebody please help to find the range of values for which the following expression is valid:
4/(1+2x) - 2/(1-x) + 3/(1-x)^2
4/(1+2x) - 2/(1-x) + 3/(1-x)^2
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#2
Find the range of x values that each of the three separate expansions are valid for, then take the strictest region. For the full expansion to be valid, all of the sub expansions (not a real maths term but you know what I mean) must be valid.
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(Original post by B_9710)
Find the range of x values that each of the three separate expansions are valid for, then take the strictest region. For the full expansion to be valid, all of the sub expansions (not a real maths term but you know what I mean) must be valid.
Find the range of x values that each of the three separate expansions are valid for, then take the strictest region. For the full expansion to be valid, all of the sub expansions (not a real maths term but you know what I mean) must be valid.
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#5
In fact if you have a function similar to the one you have above 
(say) and 
are valid if 
is an element of the set 
respectively then the expansion is only valid if and only if 
.
(say) and are valid if is an element of the set respectively then the expansion is only valid if and only if .
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