A function f(x) that always increases in all rational numbers is f(x) = 1/4(x4 + ax3 + bx2 + 4x) (if x>=0)

f(x) = x (if x<0)

To rational number t which is 0= 0+) (f'(x)-1)/x >0

for rational number t1 and t2 (k=
a rational number k's minimal value that meets

integral 0 to t1 g(x) dx + 1/2(t2)2

= integral 0 to t2 g(x)dx + 1/2(t1)2

is 3

3. function f(g(x)) is only undifferentable in one x

what is a2 + b2 (a, b is static value-not variable)

can anyone solve this?