Lakshya Education MCQs

Question: If a2 + b2 + c2 + 3 = 2(a + b + c) then the value of (a + b + c) is?
Options:
A.2
B.3
C.4
D.5
Answer: Option B

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More Questions on This Topic :

Question 1. If $$x = \sqrt 3 + \sqrt 2 {\text{,}}$$    then the value of $$\left( {x + \frac{1}{x}} \right)\,{\text{is?}}$$
  1.    $${\text{2}}\sqrt 2 $$
  2.    $${\text{2}}\sqrt 3 $$
  3.    2
  4.    3
Answer: Option B
Question 2. If p + q = 10 and pq = 5, then the numerical value of $$\frac{p}{q}{\text{ + }}\frac{q}{p}$$   will be?
  1.    16
  2.    20
  3.    22
  4.    18
Answer: Option D
Question 3. If x - y = 2, xy = 24, then the value of (x2 + y2) is?
  1.    25
  2.    36
  3.    63
  4.    52
Answer: Option D
Question 4. If $$x - \frac{1}{x} = 5{\text{,}}$$   then $${x^2}{\text{ + }}\frac{1}{{{x^2}}}$$   is?
  1.    5
  2.    25
  3.    27
  4.    23
Answer: Option C
Question 5. If $$n = 7 + 4\sqrt 3 {\text{,}}$$   then the value of $$\left( {\sqrt n + \frac{1}{{\sqrt n }}} \right)$$   is:
  1.    $${\text{2}}\sqrt 3 $$
  2.    4
  3.    -4
  4.    $$ - 2\sqrt 3 $$
Answer: Option B
Question 6. If ax2 + bx + c = a(x - p)2, then the relation among a, b, c would be?
  1.    abc = 1
  2.    b2 = ac
  3.    b2 = 4ac
  4.    2b = a + c
Answer: Option C

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