Ms. Soo's PC12 Class (June 5) by April Soo https://padlet.com/soo_april1/605 Made with ♥ en-us 2020-06-04 22:27:28 UTC 2025-04-19 14:40:03 UTC hello@padlet.com https://padlet.net/icons/png/1f9d0.png Truths and Lies soo_april1 https://padlet.com/soo_april1/605/wish/612038327 Which of these are truths, and which of these are lies? Why?]]> 2020-06-04 23:01:06 UTC https://padlet.com/soo_april1/605/wish/612038327 Jovan zhou https://padlet.com/soo_april1/605/wish/612096873 2 is correct while 1&3 is not true
statement 1&3 is not true because the root is the whole one and we do not know x is positive or negative. ]]> 2020-06-05 00:08:57 UTC https://padlet.com/soo_april1/605/wish/612096873 Andy Wang https://padlet.com/soo_april1/605/wish/612096874 1. Lie: √(9-4)≠3-2
2. True: √(9/4)=3/2
3. Lie: √(3^2+2^2)≠3+2]]> 2020-06-05 00:08:57 UTC https://padlet.com/soo_april1/605/wish/612096874 Marie https://padlet.com/soo_april1/605/wish/612096980 1 3 are lies
2 is true
can put a number to check
or square both sides]]> 2020-06-05 00:09:05 UTC https://padlet.com/soo_april1/605/wish/612096980 Cindy Ruan https://padlet.com/soo_april1/605/wish/612096984 1. Lie
2. True
3. Lie]]> 2020-06-05 00:09:05 UTC https://padlet.com/soo_april1/605/wish/612096984 Vivian https://padlet.com/soo_april1/605/wish/612097022 1.Lie
2.Truth
3.Lie]]> 2020-06-05 00:09:09 UTC https://padlet.com/soo_april1/605/wish/612097022 Tammy https://padlet.com/soo_april1/605/wish/612097461 1 is lie √（9-5）=2， √9-√5=0.76； 2 is true；3 is lie √2^2+3^2=3.61, 2+3=5]]> 2020-06-05 00:09:42 UTC https://padlet.com/soo_april1/605/wish/612097461 Bruce https://padlet.com/soo_april1/605/wish/612097641 1. lie.
2. True.
3. Lie. ]]> 2020-06-05 00:09:56 UTC https://padlet.com/soo_april1/605/wish/612097641 Fiona https://padlet.com/soo_april1/605/wish/612097898 1. lie
2. true
3. lie]]> 2020-06-05 00:10:18 UTC https://padlet.com/soo_april1/605/wish/612097898 John https://padlet.com/soo_april1/605/wish/612098053 1. Truth
2. Truth
3. lie]]> 2020-06-05 00:10:29 UTC https://padlet.com/soo_april1/605/wish/612098053 Louie https://padlet.com/soo_april1/605/wish/612098311 1. √(x-5) = (x-5)^1/2

≠ √(x)-√(5)

Thus, the given proposition is false.

2. √(x/7) = (x/7)^1/2 = (x^1/2)/(7^1/2)
Thus, the given proposition is true.
3. √(x²+3²) = (x²+3²)^1/2
To eliminate square root, the radicands should be a perfect square.
However, (x²+3²)is not a perfect square.
Thus, the given proposition is false.

]]> 2020-06-05 00:10:51 UTC https://padlet.com/soo_april1/605/wish/612098311 Tina https://padlet.com/soo_april1/605/wish/612098769 The first one is lie. It can be proven through an example. When x=16, √x-5= √16-5=√11, however, √16-√5=4-√5 which is not equal to √11.
The second one is true. √x/7 = √x*√1/7=√x/√7
The third one is a lie. for example, √4²+3²=√16+9=√25=5, but 4+3=7, doesn't match.]]> 2020-06-05 00:11:24 UTC https://padlet.com/soo_april1/605/wish/612098769 Elaine https://padlet.com/soo_april1/605/wish/612098935 1 lie, 2 true, 3 lie

]]> 2020-06-05 00:11:37 UTC https://padlet.com/soo_april1/605/wish/612098935 Roy https://padlet.com/soo_april1/605/wish/612099959 1，2 are true and 3 is lie]]> 2020-06-05 00:12:58 UTC https://padlet.com/soo_april1/605/wish/612099959 Jack https://padlet.com/soo_april1/605/wish/612099964 1.True
2.True
3.Lie]]> 2020-06-05 00:12:59 UTC https://padlet.com/soo_april1/605/wish/612099964 Sabrina Feng https://padlet.com/soo_april1/605/wish/612100378 Lies:1 and 3
Truths:2
we can use ]]> 2020-06-05 00:13:26 UTC https://padlet.com/soo_april1/605/wish/612100378 https://padlet.com/soo_april1/605/wish/612100464 1.false 2.true 3. false]]> 2020-06-05 00:13:33 UTC https://padlet.com/soo_april1/605/wish/612100464 https://padlet.com/soo_april1/605/wish/612100658 Luffy false true false ]]> 2020-06-05 00:13:46 UTC https://padlet.com/soo_april1/605/wish/612100658 Ken https://padlet.com/soo_april1/605/wish/612101255 1.Lie
2.Truth
3.Lie]]> 2020-06-05 00:14:31 UTC https://padlet.com/soo_april1/605/wish/612101255 Jason https://padlet.com/soo_april1/605/wish/612103235 1.lie
2.true
3. lie]]> 2020-06-05 00:16:50 UTC https://padlet.com/soo_april1/605/wish/612103235 Andy Wang https://padlet.com/soo_april1/605/wish/612103935 lie
truth
lie]]> 2020-06-05 00:17:37 UTC https://padlet.com/soo_april1/605/wish/612103935 YukiJudai https://padlet.com/soo_april1/605/wish/612104923 1 Lie
2 True
3 Lie]]> 2020-06-05 00:18:40 UTC https://padlet.com/soo_april1/605/wish/612104923 https://padlet.com/soo_april1/605/wish/612104932 1. Lie
2. Truth
3. Lie ]]> 2020-06-05 00:18:41 UTC https://padlet.com/soo_april1/605/wish/612104932 1-lies https://padlet.com/soo_april1/605/wish/612105093 2-truth
3-lies]]> 2020-06-05 00:18:52 UTC https://padlet.com/soo_april1/605/wish/612105093