Lakshya Education MCQs

Question: When xm is multiplied by xn, product is 1. The relation between m and n is?
Options:
A.mn = 1
B.m + n = 1
C.m = n
D.m = -n
Answer: Option D

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More Questions on This Topic :

Question 1. The area (in sq. unit) of the triangle formed by the graphs of the equations x = 4, y = 3 and 3x + 4y = 12 is?
  1.    24 sq. units
  2.    6 sq. units
  3.    12 sq. units
  4.    3 sq. units
Answer: Option B
Question 2. If x = 5, then the value of the expression $${x^2} - 2 + \frac{1}{{{x^2}}}$$   is?
  1.    $$\frac{{576}}{{25}}$$
  2.    $$\frac{{24}}{{25}}$$
  3.    $$\frac{{24}}{5}$$
  4.    $$\frac{{625}}{{24}}$$
Answer: Option A
Question 3. If x = 2, y = 1 and z = -3, then x3 + y3 + z3 - 3xyz is equal to?
  1.    6
  2.    0
  3.    2
  4.    8
Answer: Option B
Question 4. If 2s = a + b + c, then the value of s(s - c) + (s - a) (s - b) is?
  1.    ab
  2.    0
  3.    abc
  4.    $$\frac{{a + b + c}}{2}$$
Answer: Option A
Question 5. If $$m = \sqrt {5 + \sqrt {5 + \sqrt {5.....} } } $$      and $$n = \sqrt {5 - \sqrt {5 - \sqrt {5.....} } } $$      then among the following the relation between m & n holds is?
  1.    m - n + 1 = 0
  2.    m + n + 1 = 0
  3.    m + n - 1 = 0
  4.    m - n - 1 = 0
Answer: Option D
Question 6. 3(a2 + b2 + c2) = (a + b + c)2 then the relation between a, b and c is ?
  1.    a = b ≠ c
  2.    a ≠ b ≠ c
  3.    a ≠ b = c
  4.    a = b = c
Answer: Option D

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