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How many subsets does the set {a1,a2,...,an} of n elements have? How many subets are the containing the element a1? Prove your claim.
Cant solve this:
_ - _ x _ / _ = 78
using 84, 54, 9, 1
Fill in the blanks
Find the number of ways of forming a group of 2k people from n couple, where k,n are elements of N with 2k≤n in each case: i) k couples are in such a group, ii) no couples are included in such a group, iii) at least one couple is included in such a group, and iv) exactly two couples are included in such a group.
if x and y are prime to 3, prove that x^2 + y^@ cannot be a perfect square
a school has 1200 pupils.575 of these pupils are girls .
2, 5ths of the girls like sport , 3, 5ths of the boys like sport ,whats the total number of pupils in the school who like sport??
If the first three terms of the expansion of (1+x+ax^2)^n are 1+7x+14x^2, Find the values of n and a?
Please take me step by step D:
Are there any square numbers whose last digit is 2?
An ILP problem has 5 binary decision variables. How many possible integer solutions are there to this problem?
a. 5
b. 10
c. 25
d. 32
How can I prove that p=(2^k)-1 is prime if k is odd integer except when k=2?
What is the sum of square of 2,3,5 and 7? Grade 5.
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