If x=y=z, then (x+y+z)²/(x²+y²+z²) is

  1. 3
  2. 1
  3. 4
  4. 2
Monis Rasool Professor Asked on 21st November 2015 in Maths.
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2 Answer(s)

Answer (1) 3

sujeetstar24 Newbie Answered on 21st November 2015.
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Answer: (1) 3

Explanation:-

Given-
x = y = z
Then, (x + y + z)²/(x² + y² + z²)
(x + x + x)²/(x² + x² + x²)                                  (x = y = z  Given in the question)
= (3 x)²/3 x²
= 9 x² = 3 x²
= 3

Then, the value of (x + y + z)²/(x² + y² + z²) is 3.

Hence, the answer is (1) 3.

Anurag Mishra Professor Answered on 22nd November 2015.
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