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Complex Numbers

Authored by Ganthimathi Muthunadar

Mathematics

11th Grade

CCSS covered

Used 61+ times

Complex Numbers
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10 questions

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1.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

 MultiplicativeInverse  of 3i4 isMultiplicativeInverse\ \ of\ 3i-4\ is  

 3i+425\frac{3i+4}{-25}  

 4 +3i25\frac{4\ +3i}{25}  

 3i+425\frac{-3i+4}{-25}  

 4 3i25\frac{-4\ -3i}{25}  

2.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

 Evaluate: 16 + 25Evaluate:\ \sqrt{-16}\ +\ \sqrt{-25}  

 4+5i4+5i  

 54i5-4i  

 99  

 9i9i  

Tags

CCSS.HSN.CN.A.2

3.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

 Square root of  i isSquare\ root\ of\ \ i\ is  

 ±(1212)\pm\left(\frac{1}{\sqrt{2}}-\frac{1}{\sqrt{2}}\right)  

 ±(12+12)\pm\left(\frac{1}{\sqrt{2}}+\frac{1}{\sqrt{2}}\right)  

 ±(12+12)\pm\left(-\frac{1}{\sqrt{2}}+\frac{1}{\sqrt{2}}\right)  

 (1212) and ( 12+12)\left(\frac{1}{\sqrt{2}}-\frac{1}{\sqrt{2}}\right)\ and\ \left(\ -\frac{1}{\sqrt{2}}+\frac{1}{\sqrt{2}}\right)  

4.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

 32i= \left|3-2i\right|=\ ----  

 13\sqrt{-13}  

 1\sqrt{-1}  

 13\sqrt{13}  

 55  

5.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

 Express i1+i in  a+ib  form Express\ \frac{i}{1+i}\ in\ \ a+ib\ \ form\   

 12 + 12i\frac{1}{2}\ +\ \frac{1}{2}i  

 1+i1+i  

 12 + i\frac{1}{2}\ +\ i  

 12  i2\frac{1}{2}\ -\ \frac{i}{2}  

Tags

CCSS.HSN.CN.A.3

6.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

 If (3x1)+(3y)i =5, x=, y=If\ \left(3x-1\right)+\left(\sqrt{3}-y\right)i\ =5,\ x=-,\ y=-  

 x=2 and y=3x=2\ and\ y=\sqrt{-3}  

 x=6 and y=3x=6\ and\ y=3  

 x=3 and y=2x=\sqrt{3}\ and\ y=2  

 x=2 and y=3x=2\ and\ y=\sqrt{3}  

Tags

CCSS.HSN.CN.A.1

7.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

 If (1i)x +(1+i)y=13i, values of x and y areIf\ \left(1-i\right)x\ +\left(1+i\right)y=1-3i,\ values\ of\ x\ and\ y\ are---  

 x=2 and y=1x=2\ and\ y=1  

 x=2 and y=1x=-2\ and\ y=1  

 x=1 and  y=2x=1\ and\ \ y=2  

 x=1 and y=2x=1\ and\ y=-2  

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