1.4 Class Notes - Feb 1 lecture HWK#2 Due Wed 2/7 Thurs 2/8...

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HWK #2. Due Wed 2/7, Thurs 2/8 4.1: 14, 18, 31, 71 4.2: 8, 12, 20, 28, 31 HWK #3. Due Tues 2/13, Wed 2/14 Solutions will be available 2/15 4.3: 22, 28, 36, 46 4.4: 2, 8, 18, 38b Not HWK. 4.5: 1, 7, 9, 11 Prelim 1: Tues 2/20 covers 3.3-4.5 Feb 1 lecture Rule 1: (x p ) = px p-1 Rule 2: (cf) = cf Rule 3. (f+g) = f + g Rule 4. (fg) = f g + f g Rule 5. (1/g) = - g / g 2 The crow and the snail by Reto Zach Sea gulls and crows feed on various types of mollusks by lifting them into the air and dropping them onto a rock to break open their shells. Biologists have observed that northwestern crows consistently drop a type of mollusk called a whelk from a mean height of about 5 meters. Practice Problem 45 on page 236 20 1 1 Find ' Where is ' 0? W H H W W = + = (fg) = f g + f g (1/h) = -1/h 2 2 20 1 1 20 1 ' 1 1 ( 1) W H H W H H H = + = + + 2 2 2 2 20 1 1 20 1 ' 1 1 ( 1) 20( 1) 20 20 1 1 ( 1) ( 1) ' 0 when ( 1) 20 1 20 5.57 W H H W H H H H H H H W H H
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