For signal u[n],n=0,1,….N-1, show that its DCT coefficients w[k],k=0,1,…N-1 can be computed as follows: w[k]=sqrt[2(2-del[k])]R{e to the power-j(pi)k/2N v'[k]}where del[k] is the Kronecker Delta, R denotes the real part of a complex number and v'[k]is the Unitary DFT coefficient for […]

### Category: Homework Help

## Exponential Growth/decay

My son (in Algebra 2) has been given an assignment asking him to tell whether several different equations show exponential growth or decay, and to JUSTIFY. Some examples are: 2(-0.33x)^2 and 3((0.75)^-2)x Can somebody explain how to figure out (at […]

## History Essay Question (C800 to C920)

How successfully did the Franks deal with the Viking threat to western Europe in the period from c800 to c920? (no more than 1500 words) Extract: Annals of St Bertin, 845, ed. & trans. Janet L. Nelson ?In March 845, […]

## Three Math Equations

I need answers to these three math questions. Directions: Find all the real solutions. 4/X = (9/5) – ((7X-4)/5X) (2X – 5)(X+1) = 2 and Directions: Simplify (3X-9Y) / (9y^2 – X^2)