Question # 1

If z₁ = 4i and z₂ = 3 - 9i, then z₁ + z₂ =

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3 - 5i

3i - 5

7 - 9i

3 + 5i

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The distance between the points P(x1, y1) and Q(x2, y2) is:

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Which of the following is correct:

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2 + 7i > 10 + i

1 + i > 1 - i

4 + 3i > 1 + 3i

none of these

G.M between -2i and 8i is:

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4 or -4

4i or -4i

2 or -2

none

Period of a trigonometric function is:

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any real number

any negative real number

any integer

a least positive number

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1

-1

-6

6

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None

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Minors and co-factors of the elements in a determinant are equal in magnitude but they may differ in:

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order

position

sign

symmetry

The series 2 + 2 + 2 ..... is:

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divergent

convergent

oscillatory

none of these

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linear equation

Quadraticequation

cubicequation

radicalequation

The domain of principal tangent function is:

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{1, 2, 3}

{5, 6, 7}

{4}

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T₆

T₇

T₈

T₅

Conjugate of complex number (-a, -b) is:

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(-a, b)

(-a, -b)

(a, -b)

none of these

For what value of k, the sum of the roots of the equation x² + kx + 4 = 0 is equal to the product of its roots:

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±1

4

±4

-4

π is defined as:

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ration of diameter of a circle to its circumference

ration of the circumference of a circle to its diameter

ration of area of a circle to its circumference

ration of the circumference of a circle to its area

If a_n-3 = 2n - 5 then a_n =

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2n-1

2n+1

2n+3

none

Multiplicative inverse of -i is:

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i

-i

1

-1

If A = [aij] and B = [bij] are two matrices of same order r × s, then order of A - B is:

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r - s

r × s

r + s

none of these

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11th Class ICS Mathematics Test Online MCQs With Answers

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