What is the gramataical mean of 4 and 9?

Answer 1

1There is no such thing as a "gramataical" mean. There are 3 basic means, and the chart below should clarify that.

Assuming you meant "geometric" mean, we have:

nth root of (x1 * x2 * ... * xn) or (x1 * x2 * ... * xn)1/n.

Thus, plugging in the values, we have:

(4 * 9)1/2 which is a square root, gives the value: sqrt(4 * 9).

Distribute (or simply multiply) the values with the square root. So:

sqrt(36) = 6, or sqrt(4) * sqrt(9) = 2 * 3 = 6.

Means:The 3 basic means are: AM, GM, and HM.

AM (Arithmetic Mean):

(x1 + x2 + ... + xn)/n = AM

Add all the values, and divide by the number of terms you have.

GM (Geometric Mean):

(x1 * x2 * ... xn)1/n or nth root of (x1 * x2 * ... * xn)

Multiply all the values and take the nth root of thereof.

HM (Harmonic Mean):

n/(1/x1 + 1/x2 + ... 1/xn). (When dealing with 2 terms, we can use the formula: (2x1x2)/(x1 + x2), and 3 using (3x1x2x3)/(x1x2 + x2x3 + x1x3), satisfying the addition comboniation 1 + 2 = 3).