It is known that the odd function f (x) = x ^ 3 + ax ^ 2 + BX + C is an increasing function defined on [- 1,1] It is known that the odd function f (x) = x ^ 3 + ax ^ 2 + BX + C is an increasing function defined on [- 1,1] 1 find the value range of real number B; 2 if B2 TB + 1 ≥ f (x) is constant for X ∈ [- 1,1], find the value range of real number t

It is known that the odd function f (x) = x ^ 3 + ax ^ 2 + BX + C is an increasing function defined on [- 1,1] It is known that the odd function f (x) = x ^ 3 + ax ^ 2 + BX + C is an increasing function defined on [- 1,1] 1 find the value range of real number B; 2 if B2 TB + 1 ≥ f (x) is constant for X ∈ [- 1,1], find the value range of real number t

one
Function is odd, f (- x) = - f (x)
F (- x) = - x ^ 3 + ax ^ 2-bx + C = - x ^ 3-ax ^ 2-bx-c
ax^2+c=0
If the equation holds for any x defined on [- 1,1], then a = 0, C = 0
f(x)=x^3+bx
F '(x) = 3x ^ 2 + B, the function is an increasing function, f' (x) > 0
3x^2+b>0
b>-3x^2
-1≤x≤1
-3≤-3x^2≤0
If b > - 3x ^ 2 is true for X on any domain, then b > 0
two