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junior college 2 | H2 Maths
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the function f is continuous
what the values of a,b,c ?
Date Posted: 6 years ago
Views: 419
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thx, but I don't understand why a=-3? (f(x) is contionuos, but what this help me to know a=-3)?!?
Originally, f(x) = (x-2)(x+3)/(x-a) for x
which causes f(x) --> infinity , and f(x) becomes not continuous.
Therefore if a = -3
then for x
which causes f(x) --> infinity , and f(x) becomes not continuous.
Therefore if a = -3
then for x
I think you should also explain why a cannot be 2.
if a=2,
then when x--> a+ ,
it can be shown that f(x) --> infinity
and that would make f(x) not continuous.
hence a cannot be 2.
then when x--> a+ ,
it can be shown that f(x) --> infinity
and that would make f(x) not continuous.
hence a cannot be 2.
thx :)
thx :)
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