anonymous
  • anonymous
find any real number for which the rational expression is undefined a-5/7
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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schrodinger
  • schrodinger
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anonymous
  • anonymous
is it (a-5)/7 or a-(5/7)???
anonymous
  • anonymous
(a-5)/7
anonymous
  • anonymous
it's defined for all values of a.. if you were asking about \[7 \over a-5\] then it would be undefined at \[a-5=0 \implies a=5\]

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anonymous
  • anonymous
so then answer would be 0 or 5?
anonymous
  • anonymous
the answer to your question would be "phi" (since there is no a where (a-5)/7 the expression undefined)
anonymous
  • anonymous
I meant by phi the empty set.. looks I am complicating things!! :) you just need to know that the expression you gave is defined for all values of a. that's it
anonymous
  • anonymous
ok thanks

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