It is known that the domain of definition of function f (x) is (- 5,5) and satisfies the following conditions: F (x) is an odd function, (2) f (x) decreases monotonically on the domain of definition, (3) f (1-A) + F (2a-5)

It is known that the domain of definition of function f (x) is (- 5,5) and satisfies the following conditions: F (x) is an odd function, (2) f (x) decreases monotonically on the domain of definition, (3) f (1-A) + F (2a-5)

f(1-a)+f(2a-5)<0
∴f(2a-5)<-f(1-a)
Odd function
∴f(2a-5)<f(a-1)
Monotone decreasing
∴2a-5>a-1
And - 5 < 1-A < 5
-5 < 2a-5 < 5 (in the domain of definition, otherwise it is wrong)
∴a∈(4,5)