Question

( frac{operatorname{gx}}{x} d x )
Let ( u=log x ). Then ( d u=frac{1}{x} d x ).
( therefore int_{a}^{b} u d u=frac{1}{2} u^{2}+c )
Substituting 800 u we qet ( left[frac{1}{2}(operatorname{cog} x)^{2}+cright]_{a}^{b} )
( left.=-frac{1}{2} log aright)^{2}+frac{1}{2}(operatorname{cg} b)^{2} )

# e then find the value of and 25. Find and in the expansion of (1 + . the titth term is four time the to the fourth term is 6 times the third term 26 Minst the terms in the expansion of a positive integral power of a bene and 3 respectively find the binomial namin

Solution