What is the reciprocal of the sum of minus 1 / 2 and 1 / 3? What is the reciprocal of the sum of minus 1 / 2 and 1 / 3

What is the reciprocal of the sum of minus 1 / 2 and 1 / 3? What is the reciprocal of the sum of minus 1 / 2 and 1 / 3

-1 / 2 + 1 / 3 = - 1 / 6, the reciprocal is 1 / (- 1 / 6) = - 6, the second question: - the reciprocal of 1 / 2 is - 2, the reciprocal of 1 / 3 is 3, the sum of the reciprocal is - 2 + 3 = 1, I hope it can help you,

+What is the negative reciprocal of 1 / 3?

-3

Given the function f (x) = log3x + 2, X ∈ [1.9], find the maximum value of the function y = [f (x)] ^ 2 + F (x ^ 2) and the value of X when y takes the maximum value

Let t = f (x) = log3x + 2 ∈ [2.4], y = t square + 2t-2, y (T) min = y (2) = 6, y (T) max = y (4) = 22

The monotone increasing interval of function y = x & # 178; - X & # 179; is monotone decreasing interval, and the derivative will not be calculated

y‘=-3x²+2x
=-x（3x-2）
Let y '> 0, then 0

If the difference between the numerator and denominator of the original fraction is 63, calculate the original fraction

Let the common divisor be x, then the denominator is 11x, the numerator is 4x, 11x-4x = 63, x = 9, so the original fraction is 36 / 99

General solution of differential equation y '= (y ^ 2 + x ^ 3) / 2XY

Wrong. It's CX, not CX squared. It's very fast to make up the total differential, but sometimes I can't see it at a glance. My method can be said to be a universal method. If both sides multiply a coefficient, I can't see that the total differential can go on

-3 8 - 15 24 general term formula
How to seek? Is there a way

An = (n + 1) ^ 2 * (- 1) ^ n + (- 1) ^ (n + 1) (n is a positive integer)

Can you write a two digit division with nine numbers 1-9? Try. (numbers can't be reused) & nbsp;

4396÷28=1575346÷18=2975346÷27=1985796÷12=4835796÷42=1387254÷39=1867632÷48=159

Space rectangular coordinate system
Three points a (5,8,3), B (- 1,0,1), C (2,4,3) are known
To prove that A.B.C three points are collinear

Calculate the value of AB vector, and then calculate the value of AC vector, get AB is equal to several times of AC, prove that three points are collinear

It is known that the straight line kx-y + 1 = 0 and the hyperbola 2 / 2 x square - y square = 1 intersect at two different points a and B. find the value range of K

y=kx-1
0.5x.x-(kx-1)(kx-1)=1
(0.5-k.k)x.x+2kx-2=0
△=（2k）(2k)-4(0.5-k.k)(-2)>0
The solution is K