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  1. If 5√x + 12√x = 13√x , then x is equal to
    1. 25
      4
    2. 4
    3. 9
    4. 16
Correct Option: B

5√x + 12√x = 13√x
We know that 52 + 122 + 132
[Pythagorean Triplet]
∴ √x = 2 ⇒ x = 22 = 4


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