Harmonic mean between x and y is

Harmonic mean between two positive numbers x and y, The simplified formula is I.e. you need to double the product of x and y then divide it by the sum of x and y...~

Harmonic mean between x and y is

In maths, the harmonic mean between two numbers, say x and y is defined as :-

For example, take two numbers 4 and 8 .

=> H = 2 × 4 × 8 / (4 + 8)

=> H = 64 / 12

=> H = 5.3333

So, this is how we calculate the harmonic mean of any two numbers.

[ H stands for harmonic mean ]

if the eqn of the parabola is f(x) = (x-4)(x+2), we need to mult. this out to find the coordinates of the vertex.

then f(x) = x^2 + 2x - 4x - 8, and f(x) = x^2 - 2x - 8.

one way in which you can find the vertex is to calculate x = -b / (2a).   here, that comes to

        )

x = = 1.   f(1) = 1^2 - 2(1) - 8 = - 9.   vertex is at (1, -9).

        2(1) 

find another point on the curve:   let x=0, for which y=-8.   then (0, -8) is on the curve.   plot the vertex and this point and draw a smooth parabola thru both.

hope this

the median here is 25. your lowest value is 14 and highest value is 48. to find the third quartile, find the medium number in between 25 and 48 which would be 42 i believe.