Mathematics

#1

is there a real number whoes square is -1 ?

is there a real number X such that ______ ?

does there exist ____ such that x^2 =-1 ?

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#2

given any real number, there is a real number that is greater.

a. given any real number r, there is ______s such that s is ________ .

b. for any _________, ________ such that s > r .

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#3 the cube root of any negative real number is negative.

a. given any negative real number s, the cube root of ______ .

b. for any real number s , if s is _______ , then ____.

c. if a real number s ____, then _________.

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#3

There is a real number whose product with every real number equals zero.

a. some ______ has the property that its ________.

B. There is a real number a such that the product of a ________.

c. There is a real number a with the property that for every real number b _________.

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#which of the following sets are equal ?

A= { a,b,c,d} B= { d,e,a,c}

C= {d,b,a,c} D= { a,a,d,e,c,e}

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# Is 2 E {2} ?

b. how many elements are in the set {2,2,2,2} ?

c. How many elements are in the set { 0,{0} }?

d. is {0} E { { 0 } , {1} } ?

e. is 0 E { {0} ,{1} }

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# For each integer n, let Tn = { n,n^2}. How many elements are in each of T2, T-3 and T0 ? Please justify your answer