## 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

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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
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.    $$\frac{{625}}{{24}}$$
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
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.    $$\frac{{a + b + c}}{2}$$
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