math456
Need help!! Q.13.



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math456
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\[f(x)=(x+2x ^{3})^{4}\]
a=1

math456
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@myko @Champion

math456
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@cwrw238

myko
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what's the question?

math456
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Us the definition of continuity and the properties of limits to show that the function is continuous at the given number a.

myko
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you have to show that:
\[\lim _{x>1} f(x)=f(1)\]

math456
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ohh so all i hv to do is to plug in 1 in the f(x) function?

myko
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that for f(1).
Later use the fact that lim(x+2x^3) = lim x + lim 2x^3
and lim x>a f(g(x))= f(g(a))

math456
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so is it 81?

myko
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it doesn't asks you for the value, it just say "show it continuous"

math456
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oh okay! thank you