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Question:
Describe the strings in the set S of strings over the alphabet Σ = {a, b, c} defined recursively by (1) c ∈ S and (2) if x ∈ S then xa ∈ S and xb ∈ S and cx ∈ S. Hint: Your description should be a sentence that provides an easy test to check if a given string is in the set or not. An example of such a description is: S consists of all strings of a's, b's, and c's, with more a's than b's. That isn't a correct description since cab is in S and doesn't have more a's than b's, and also baac isn't in S, but does have more a's than b's. So that attempted description is really terrible. The best way to do this problem is to use the rules to build a bunch of strings in S until a suitable description becomes obvious.
If verbal, discuss whether the dispute arises from vagueness or ambiguity.- Yesterday I visited the exhibition of the work of Jean Michel Basquiat at the Central Gallery.
The public debt for the state of California was recently given as $94,002,052,157. Show how you would read this number.
A 4.0-ft wall stands 2.0 ft from a building. The ends of a straight pole touch the building and the ground 6.0 ft from the wall.
Determine, whether the function is odd or even and Find the average value of the function on its period - Present the function by the Fourier series
A force acts on the .25m diameter cylinder at point A as shown. The rope is connected to the cylinder at the top edge in the y-z plane. What is the moment at the origin caused by the force? Attached is the question and an illustration.
How much would you have in a bank account at the end of 9 years if $9,390 is invested at 3% compounded quarterly?
Twenty rivets are used to fasten two steel plates together. The plates are 2.8 m long, and the rivets are equally spaced with a rivet at each end. Find the distance between the rivets. Round to the nearest tenth of a centimeter.
In fighting a fire, it is necessary to spray over nearby trees such that the height h (in m) of the spray is h = 1.5 + 7.2x - 1.2x2 where x (in m).
The United States House of Representatives has 78 women representative with 59 being democrats and 19 being republicans. If a lobbyist for AARP randomly selects three different representatives to visit what is the probability
A building-materials firm loads trucks with two pay loader tractors. The distribution of truck-loading times has been foqnd to be exponential.
The angle between two planes is defined as the angle between their normals. Find the angle between the two planes x + 3y + 2z = 4 and 2x - 5y + z = 2.
southeastern bell stocks a certain switch connector at its central warehouse for supplying field service offices. the
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