Modern 2:Exam 1 Overview
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concerned <math>1.9 = 3 </math> and <math>\pi = 3 </math> so <math>1.9 \pi = 6</math> | concerned <math>1.9 = 3 </math> and <math>\pi = 3 </math> so <math>1.9 \pi = 6</math> | ||
* lots of people messed up exponents when doing division. <math>10^9 / 10^{-9} = 10^{18} </math> | * lots of people messed up exponents when doing division. <math>10^9 / 10^{-9} = 10^{18} </math> | ||
| + | * break up complicated numerical factors involving multiplications and divisions into small pieces. First do the numerator, then do the denominator and then get your final estimate. | ||
| + | * lots of people messed up: <math> |e^{I k x}|^2 </math>. This is 1! | ||
Revision as of 16:39, 6 March 2006
tips and tricks
- I don't expect exactitude in numerical calculations. So as far as I'm
concerned 1.9 = 3 and π = 3 so 1.9π = 6
- lots of people messed up exponents when doing division. 109 / 10 − 9 = 1018
- break up complicated numerical factors involving multiplications and divisions into small pieces. First do the numerator, then do the denominator and then get your final estimate.
- lots of people messed up: | eIkx | 2. This is 1!
