Grade IX(First Term Examination)-Opt. Mathematics

If (3x, 2y+2) = (15, 3y-1) are equal ordered pairs, then what are the possible values of x and y?

• x = 5, y=3

• x = 3, y=5

• x=3, y= 3

• x=5 ,y=5

If R = {(1,2), (4, 8), (6, 12)}, then which one is the true relation assigned?

• "is greater than"

• "is square of"

• " is double of "

• "is half of"

What is the type of the given function?

• One to one function

• many to one function

• Onto function

• it is not a function

If f= {(1,2), (3,4), (4,6)}, then what is the type of it?

• Into function

• one to one function

• Many to one function

• none of the above

Relation is a subset of ......................

• Cartesian product

• Domain

• Range

• Co-domain

By how many ways can we represent a cartesian product?

• 4

• 2

• 3

• 5

If n(A) = x, n(B)= y and n(A x B) = z then which one is the correct relation between x, y and z?

• x = y= z

• yz = x

• xy=z

• xyz =1

From the table along side, which of the following is "is square of " relation?

• R = {(1,1), (4,2), (9,3)}

• R= {(1,1), (2,4), (3,9)

• R= {(1,2), (1,3), (1,2)}

• R= { 4,1), (4,2), (9,3)}

From the given mapping diagram, what is the co-domain of given function?

• {3,5,7,9}

• {4,5,6,7,8}

• {5,6,7,8}

• {(3,5),(5,6),(7,7),(9,8)

What is nth term of the following sequence: 2,4,6,8,.............

• 2n+1

• 2n

• 2n-1

• n+1