【题目】-|||-gt dfrac (1)(x)

[题目]证明:当 gt 1 时, ^x-1gt dfrac (1)(2)(x)^2+dfrac (1)(2)

[题目]若 (dfrac (1)(x))=x, 则 (x)= ()-|||-A、 dfrac (1)(x)-|||-B、 dfrac (1)({x)^2}-||

[题目] lim _(xarrow 1)(dfrac (x)(x-1)-dfrac (1)(ln x))

[题目]解不等式: dfrac (x-1)(x+1)gt 0 -

[题目 lim _(xarrow 0)dfrac (ln {(1+x))^dfrac (1{x)-1}}(x)

[题目]设 (dfrac (1)(x))=dfrac (x)({x)^2+1} 则 f(x)=

[题目] lim _(xarrow 0)(dfrac (1)({x)^2}-dfrac (1)(xsin x))

[题目]已知 (dfrac (1)(x))=dfrac (5)(x)+2(x)^2, 则 f(x)=

[题目]设 (x+dfrac (1)(x))=(x)^2+dfrac (1)({x)^2}, 则f(x)= __

[题目]已知 (x+dfrac (1)(x))=dfrac ({x)^2}({x)^4+1}, 求f(x)