NCERT Class 11-Math's: Chapter –5 Complex Numbers and Quadratic Equations Part 15

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Question 47:

is possible if

(A)

(B)

(C)

(D)

Answer: (C)

Question 48:

The real value of for which the expression is a real number is:

(A)

(B)

(C)

(D)None of these

Answer: (C)

Question 49:

The value of when is:

(A)

(B)

(C)

(D) none of these

Answer: (C)

Question 50:

If , where then is

(A)

(B)

(C)

(D) None of these

Answer: (A)