Aptitude | Algebra | Question 4

For what value of x, the following equation: 5^√x +12^√x =13^√x will be true?

(A)

-2

(B)

0

(C)

3

(D)

None of the above

Answer: (D)

Explanation:

say x=1
17!=13

for, x=2 and 3 also not possible 
x=4 
52+122=132 
169=169

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