- #1
moham_87
- 13
- 0
i really need to know...
first->
integration of:
x/(x^4 + 2x^2 + 1)
i tried solving that using (ln), u=g(x), and a lot of ways, but i couldn't get an answer
second->
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Is the following argument valid? Explain
f(x) =
1 if (x) is rational and (x)>0
-1 if (x) is rational and (x)<0
0 if (x) is irrational
is defined for all numbers in [-1,1] and has the property that f(-x)=-f(x) for all (x) in [-1,1].
Thus, definite integration{0 to 1 of f(x).dx}=0
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i couldn't understand the question, and what is meant by "irrational", i think all values (even integers) can be rational
thank u alot, i wish to reply as soon as possible, my exam is TOMORROW... and any efforts will be appreciated
first->
integration of:
x/(x^4 + 2x^2 + 1)
i tried solving that using (ln), u=g(x), and a lot of ways, but i couldn't get an answer
second->
-----------------------------------------------------------------
Is the following argument valid? Explain
f(x) =
1 if (x) is rational and (x)>0
-1 if (x) is rational and (x)<0
0 if (x) is irrational
is defined for all numbers in [-1,1] and has the property that f(-x)=-f(x) for all (x) in [-1,1].
Thus, definite integration{0 to 1 of f(x).dx}=0
-----------------------------------------------------------------
i couldn't understand the question, and what is meant by "irrational", i think all values (even integers) can be rational
thank u alot, i wish to reply as soon as possible, my exam is TOMORROW... and any efforts will be appreciated