I honestly cant believe how crappy my prep was. Barrons was not even close to this. In fact i found this to be far harder than barrons because it got me thinking differently.
What was the factorial one : like 11!/8!x3!
yeah it was 11!/8!3! but how come? that’s defintiely right I got it wrong but can you explain
Thats what you would get if you use the written combination formula, instead i just went 11c3 and then tried all the answer choices
Thats what you would get if you use the written combination formula, instead i just went 11c3 and then tried all the answer choices
since it said different people so I Thought it meant permutation
The integer one was B… I think it was (x + y) / 2 = n^2 because then y=2n^2 - n^2 = n^2
@rogerfedererfan1 nah it meant combination.
The solution for permutation would’ve been something like 60’000 so i knew it had to be combination…
what was the one talking about a graph and standard deviation ? Ive never heard of the concept and i just guessed 0 idek why
if you draw a normal distribution graph (bell curve) the axis of symmetry is at z=0, which is 0 sd away from the mean.
So is 0 the right answer? Only other guess was the stupid e^2sinx one. I think i put months january and august which was like B
Guys what did you put for the one about the period of like the addition of a cos and sin function added together?
yes, 0 is the right answer. i put february and august for that one. I didnt’ have time to thoroughly check all the months. the equation was y=1000e^2sint. where 0<t<1 is jan, 1<t<2 is feb, etc 11<12 is dec.
edit: just graphed it on desmos, it’s indeed feb and august; the max occurs at ~1.5 and ~7.9.
I thought it was feburary but i chose B… Hm was that jan or feb ?
^what about the period for the sum of the trig functions. lol i didnt know how to do it so I just took the period of both and added them together. pretty sure it was wrong though
@yolomaster98 I got “3” for the answer because both periods were 2 and 1 respectively so I just added them, don’t know if it’s correct though. Anyone have any other opinions?
The period was 2 if you graphed it !
i graphed it on my calculator and actually ended up with 3pi/2, but that wasn’t an option so i omitted it. if i had 2 more mins maybe i coulda worked it out : c
What do you guys think the curve will be for this test?
@kentonpalmer So you don’t add both of the periods? The larger period overrides the smaller one? And did anyone get feb and July for the month problem?