The monotone decreasing interval of 2-3x ^ 2 power of function y = 3 is

The monotone decreasing interval of 2-3x ^ 2 power of function y = 3 is

Y '= - 6ln3 times 2-3x ^ 2 of 3 times x
According to the property of exponential function 3, the 2-3x ^ 2 power is always greater than zero, which can not be considered
If you haven't learned the derivative yet, you can use the property of composite function: same increase but different decrease (that is, the monotonicity of the functions involved in the load is the same, the composite function is increasing, otherwise it is decreasing). This function is composed of two functions y = 3 ^ u, u = 2-3x ^ 2. Because y = 3 ^ u increases monotonically, the monotone decrease interval of this function is only the monotone decrease interval of u = 2-3x ^ 2, which is obviously x greater than zero

The decreasing interval of the function f (x) = the second power of x-3x is

The decreasing interval is x ＜ - 9 / 4 or (- ∞, - 9 / 4)

When m is an integer, the solution of the equation 1 / 2mx-5 / 3 = 1 / 2 (x-4 / 3) where m is not equal to 1 is a positive integer

1/2MX-5/3=1/2(X-4/3)
Double six on both sides
3MX-10=3X-4
(3M-3)X=6
X=6/(3M-3)=2/（M-1)
M-1 is a divisor of 2
M-1=1,M-1=2
M=2,M=3