回答:
#F'(X)=(X(LN(X ^ 2 + 3))^( - 1/2))/(X ^ 2 + 3)= X /((X ^ 2 + 3)(LN(X ^ 2 + 3))^(1/2))= X /((X ^ 2 + 3)SQRT(LN(X ^ 2 + 3)))#
说明:
我们得到:
#Y =(LN(X ^ 2 + 3))^(1/2)#
#Y'= 1/2 *(LN(X ^ 2 + 3))^(1 / 2-1)* d / DX LN(X ^ 2 + 3)#
#Y'=(LN(X ^ 2 + 3))^( - 1/2)/ 2 * d / DX LN(X ^ 2 + 3)#
#d / DX LN(X ^ 2 + 3) =(d / DX X ^ 2 + 3)/(X ^ 2 + 3)#
#d / DX X ^ 2 + 3 = 2×#
#Y'=(LN(X ^ 2 + 3))^( - 1/2)/ 2 *(2×)/(X ^ 2 + 3)=(X(LN(X ^ 2 + 3))^( -1/2))/(X ^ 2 + 3)= X /((X ^ 2 + 3)(LN(X ^ 2 + 3))^(1/2))= X /((X ^ 2 3)SQRT(LN(X ^ 2 + 3)))#