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Monday, May 19, 2008

Q) Find domain of

.


A)



=


=



x8 + 1 will always be positive.


x4 - x will be least at x = (1/4)1/3 ...............found by diff. and equating to 0.


But at this value, the expression under the root is greater than 0.


Hence domain is ALL REAL NUMBERS.

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