Question about Texas Instruments TI-89 Calculator
Posted by Anonymous on
You may simply apply the power rule for determining the first derivative. If y = a * x^b then y' = a * b * x^(b-1).
In your case, a = 1, b = -1 you get:
y = x^(-1) =>
y' = 1 * (-1) * x^(-1 - 1) = -x^(-2).
Posted on Mar 20, 2014
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Posted on Jan 02, 2017
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2) Cross off number 1, because all primes are greater than 1.
3) Number 2 is a prime, so we can keep it, but we need to cross off the multiples of 2 (i.e. even numbers).
4) Number 3 is also a prime, so again we keep it and cross off the multiples of 3.
5) The next number left is 5 (because four has been crossed off), so we keep it and cross of the multiples of this number.
6) The final number left in the first row is number 7, so cross off its multiples.
7) You have finished. All of the "surviving" numbers (coloured in white below) on your grid are prime numbers.
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