Justin Sung Learning

What is the website where you can get information on the economy

the conference board

What should you look for in the bussiness section of the 10k

Look for what the company does, how it is making money, what are the units of business, who are its competitors

What should you look for in the risks section of the 10k

unique risks

Management Discussion/ MD&A

Read the management’s analysis of the company’s recent business performance and impact on financial results. As the ones running the company, the management can give you further insights into the company’s operations, competition, and industry conditions.

Financial Statements and Supplementary Data

Assess the company’s income statement, cash flow statement, and balance sheet. Are the company’s financial results predictable and improving? Are the company’s cash flow and balance sheet healthy? If there’s a sudden change in a financial item from year to year, read the financial notes to understand the change. Evaluate if it poses a substantial risk to the company

log10 x

= ln x/ ln 10

quotient rule

(g)(f’)-f(g’)/(g)²

what happens when it is to the left and does the limit exist

what is d/dx for inverse

1/f’(f^-1(x))

How do differentiability and continuity at a point relate — does either imply the other?

DIffientiable means it is continous, continuiotu doesn’t mean its differnetiable

k in half life formula is what

ln(2)/1/2 life

What is the relationship between estimation and optimization,

When you have to maximize somethign with no bounds such as population or something like that then you can use estimation accordingly.

What is the formula for sum of arthimetic and geometric sums

For arthiemetic make sure to do upper - lower +1 / 2, plus 1 to include the first term, double check by plugging in numbers for this

for growth stuff you can do rM-1 over r-1 and everyone else stays the same

What is APY what is its connection to simple interest, what is the difference between normal compound interest and compound continously.

e^r-1 since e^r is the same thing as 1+r in our normal calculation we are trying to find the r

Signed area

it is the net area so you would take the area above the x axis and then subtract the area below the x axis, it is like asking what is the area under the curve and you account for the area below the x-axis as negative area and add that on.

Variance of X in probability density and Stdev

sqrt of variance

Exponential Probability Density

Probability density for uniform

P(x)=C that means that the mean and median are both 2/(a+b)

Lagrange error bound

M(c-a)^n+1/ (n+1)! this goes 2 ways so plus or minus

series for these things

0 * positive or negative infinity

intderterminate, rearrage

infinity - infinity

Find a common denominator, factor out terms, or conjugate/rationalize.

0^0

Both indeterminate

-2 times negative infinity

positive infinity

-infinity squared

postiive infintiy