Question

What is Gravity????





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Answer 1

Answer:

Given α and β are the roots of the quadratic polynomial x^2 -(k+6)x +2(2k-1).

Hence sum of the roots = α+β = -b/a = k+6 and product of the roots = αβ = c/a = 2(2k-1)

Also given α+β = 1/2 αβ => k+6 =(1/2)2(2k-1) => k+6 = 2k-1 => k = 7

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Answer 2

Explanation:

In audio signal processing and acoustics, an echo is a reflection of sound that arrives at the listener with a delay after the direct sound. The delay is directly proportional to the distance of the reflecting surface from the source and the listener

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