What is the least possible value of (x+1)2 if -2≤x≤3?
设I1=∫[(1+x)/(x(1+xex))]dx,I2=∫[1/(u(1+u))]du,则存在函数u=u(x),使( )。
____。
____。
设 ,则f(x) =( ).
By how much does the sum of the roots of the equation (x+1) (x-3) = 0 exceed the product of its roots?
设f(x)=x(x+1)(x+2)…(x+n),则f′(0)=____.
设y=f[(2x-1)/(x+1)],f′(x)=ln(x1/3),则dy/dx____。
设f[x+(1/x)]=(x+x3)/(1+x4),则 ____。
设 ,则yx=0″=____。