Exam 1 Tentative Answers - Courtesy Itute

[fieldjus]

Here are the solutions for exam 1, thanks to Itute

Q1a x+2xln(x)
Q1b 6e^9
Q2 1/ 8(4-2x)^4 or 1/ 128(x-2)^4 Thanks to Belmasta
Q3 g(x)=(3-cos2pix)/2pi
Q4 x=7pi/3, 11pi/3
Q5a x=18/25
Q5b x=-6
Q6 a=+/- 3/2
Q7a sum of prob =1
Q7bi E(X)=28/15
Q7bii Pr(X>=28/15)=8/15
Q8 2-4/pi
Q9a a=1-sqrt(2)
Q9b End points are (-2,8), (2,2), local max (1,3), sharp min point (1-sqrt(2),1)
Q9ci image h(x)=1/3 |x^2-2|
Q10a xe^(-x/5) sq units
Q10b x=5, max area of triangle=5/e sq units
Q10c Shaded area=2.5(5ln(2)-3) sq units

Q9cii domain of image [-3,1]

If you disagree with the answers, please reply with your own responses to these questions

[Sanguinne]

9b) where we required to show the local max and the sharp min point?

[Damoz.G]

No but I did as it helped with graphing the new function

BasicAcid, did your dream come true today?

[fieldjus]

9b) where we required to show the local max and the sharp min point?

No, only endpoints were required I believe.

Q9ci image h(x)=1/3 |x^2-2|
Wasn't that 1/3 (x-2)^2 with the mods?

I am pretty sure it is the answer they gave

[Edward21]

No but I did as it helped with graphing the new function

I use the points to help with the translation, but i didn't physically write them down because they said indicate the new endpoints.....IS IS ASSUMED WE HAVE TO INCLUDE THE OTHER STRANGE POINTS!?

[ikhalid]

How did u do 7 b and c

[ikhalid]

How did u do q 10 c

[a-rod]

Shit, are consequential marks a thing in methods?

[Damoz.G]

Shit, are consequential marks a thing in methods?

Yes, there are consequential marks. Definitely!

[Jayhowz]

ISN'T 10C (5e+(5/4))loge(4)-(30/4) or (10e+(5/2))loge(2)-(15/2)?

[abcdqdxD]

will you lose a mark if you wrote E(X)=84/45 instead of 28/15?

[fieldjus]

will you lose a mark if you wrote E(X)=84/45 instead of 28/15?

No that should be fine

[darklight]

Hey guys,

Do you think i'd lose a mark if I wrote + - (root 27 over 12) rather than + - 3/2.
Also if I didn't fully simply the area at the end?

[leflyi]

Yes probably..


And yes for the root(27) over 12 as well

[Damoz.G]

Yes but it backfired up my ass and out of my mouth -_-

I can only imagine that happening.

Don't stress, Exam 2 is still not done - Time for lots of improvement.