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NCERT solution class 11 chapter 5 Complex Numbers and Quadratic Equations exercise 5.1 mathematics

EXERCISE 5.1


Page No 103:

Question 1:

Express the given complex number in the form a + ib:

Answer:

Question 2:

Express the given complex number in the form a + ibi9 + i19

Answer:

Question 3:

Express the given complex number in the form a + ibi–39

Answer:

Page No 104:

Question 4:

Express the given complex number in the form a + ib: 3(7 + i7) + i(7 + i7)

Answer:

Question 5:

Express the given complex number in the form a + ib: (1 – i) – (–1 + i6)

Answer:

Question 6:

Express the given complex number in the form a + ib:

Answer:

Question 7:

Express the given complex number in the form a + ib:

Answer:

Question 8:

Express the given complex number in the form a + ib:  (1 – i)4

Answer:

Question 9:

Express the given complex number in the form a + ib:

Answer:

Question 10:

Express the given complex number in the form a + ib:

Answer:

Question 11:

Find the multiplicative inverse of the complex number 4 – 3i

Answer:

Let z = 4 – 3i

Then,

= 4 + 3and 

Therefore, the multiplicative inverse of 4 – 3i is given by

Question 12:

Find the multiplicative inverse of the complex number 

Answer:

Let z = 

Therefore, the multiplicative inverse ofis given by

Question 13:

Find the multiplicative inverse of the complex number –i

Answer:

Let z = –i

Therefore, the multiplicative inverse of –i is given by

Question 14:

Express the following expression in the form of a + ib.

Answer:


 

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