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439

Q:

दो प्राकृत क्रमागत विषम संख्याओं के वर्गों का योग 394 होता है। संख्याओं का योग होता है -

  • 1
    24
  • 2
    32
  • 3
    40
  • 4
    28
  • Show Answer
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Answer : 4. "28"
Explanation :

Let the consecutive odd numbers be x and (x+2)

We know that x2 + (x + 2)2 = 394

We know   x2 + x2 + 4x + 4 = 394

We know   2 x2 +4x – 390 = 0

We know   x2 + 2x – 195 = 0

We know  (x +15) (x-13) = 0

We know   x = 13

We know    Required sum = 13 +15 =28

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