Identity using a combinatorial
Let n and k be integers with n ≥ k + 2 and k ≥ 2. Prove the following identity using a combinatorial proof: (n choose k) = ((n - 2) choose k) + 2 . ((n - 2) choose(k - 1)) + ((n - 2) choose (k - 2)).
Expected delivery within 24 Hours
Review the car-caravan analogy Review the car-caravan analogy
Got a dam with a 22m damwall with a 200mm valve at the bottom. The waterlevel is 20m. If I connect a cone type of reducer to reduce the outlet to say 50mm and put the turbine somewhere on the line,
A solid disk (r=0.20 m, M=0.50 kg) is suspended fro the end of an L=0.30m long rod (m=0.30 kg, cross-sectional area of 2.0 cm^2). WHAT IS THE PENDULUM'S PERIOD FOR SMALL ANGLE OSCILLATIONS
Calculate the pH at the points in the titration of 40.00 mL of 0.425 M NH3 for the reaction below. NH3(aq) + HNO3 ? NH4+(aq) + NO3?(aq) For NH3, Kb = 1.8x10-5.
Identity using a combinatorial proof Identity using a combinatorial proof
Two slits with a separation of 8.5 x 10-5 m create an interference pattern on the screen 2.3 m away. what is the linear distance from the central bright fringe to the tenth dark fringe above it
A structure is designed with a factor of safety of 5.25 psi. If the allowable stress of the structure is 3000 psi. What stress on the structure will lead to its failure
Draw the structural formula of 3,4-diethyl-3-hexene. If more than one isomer of this compound exists, then both isomers must be drawn
The end caps are spherical. The cylinder has length of 30 inc., a diameter of 8 in., and a wall thickness of 0.125 in. Determine the stress in the wall at two points A and B. For each, draw the stresses on a 3-D element.
1950385
Questions Asked
3,689
Active Tutors
1460142
Questions Answered
Start Excelling in your courses, Ask a tutor for help and get answers for your problems !!
What are the challenges for mental health professionals working with colleagues or supervisors who are best characterized
In reflecting on a time when I felt frustrated by a young child's behavior, I recall a particular instance during a group activity at a daycare
What was the economic impact of COVID-19? Address any monetary and fiscal policies used during or after COVID-19.
Go to Stars - "Les Miserables" Read the synopsis just above the video clip, then view the clip in its entirety.
Describe the responsibilities of a financial analyst. Discuss the importance of analyzing and managing finances to help make business decisions.
Explain why financial statements are important to a business and how they help a business determine its financial health.
Cognitive complexity is the ability to view situations from multiple perspectives rather than assuming that one's own viewpoint is the only valid interpretation