MBA Exam

If the roots of then which of the following relation must be true?

1) a = b, c = 0
2) ac = b<sup>2 </sup>
3) 4b<sup>2</sup> = ac
4) ac = 1
5) none of these

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MBA Other Question

What is the reminder when 39^(29^(19^9) is divided by 23

1) 5
2) 16
3) 13
4) 12
if the ratio of harmonic mean of two numbers to the geometric mean is 12:13. find the ratio of the numbers. dont know the correct ans.. tag me in the answer

1) 4/9 or 9/4
2) 2/3 or 3/2
3) 2/5 or 5/2
4) 3/4 or 4/5