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anonymous

  • 5 years ago

summation notation

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  1. anonymous
    • 5 years ago
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    \[10+\sum_{1}^{5}(n^3-1)\]

  2. anonymous
    • 5 years ago
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    It means: (1^3 -1) + (2^3 - 1) + (3^3 -1) + (4^3 -1) + (4^3 -1) +10

  3. anonymous
    • 5 years ago
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    0 + 7 + 26 + 63 + (oops that last one should be 5^3 - 1) 124 + 10 =230

  4. anonymous
    • 5 years ago
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    i knew it was like that i just wanted to make sure thank you very much!! :-)

  5. anonymous
    • 5 years ago
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    i have another question what is the domain and range of a function?

  6. anonymous
    • 5 years ago
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    sure

  7. anonymous
    • 5 years ago
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    domain is defined by the numbers above and below the summation symbol the range....hmmm I'm not sure on that since the result is one answer not like a function which would have a well...range of answers. Sorry not sure on the theory on that.

  8. anonymous
    • 5 years ago
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    If you are asking about functions in general: domain is asking what numbers can 'legally' be entered for the x value. f(x)=2+x it is ok to put any number in for x so the domain would be all real numbers noted as R or (-oo, +oo) if you like intervals. You only need to worry about domain problems when there are restrictions on valid numbers in the function. For example: NO DIVIDING BY ZERO So the domain for f(x)=1/x ...x can't = 0 ya? So all real numbers != (not equal) to 0. Other rules: can't get square roots of numbers less than 0. Range is just asking what valid answers will pop out of the function.

  9. anonymous
    • 5 years ago
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    ...

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