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一、填空题1.计算:(3n-2)/(4n+3)=____.2.方程 log_3(2x-1)=1的解x=_____.3.函数 f(x)=3x+5,x∈[0,1]的反函数f~(-1)(x)=_______.4.不等式(1-2x)/(x+1)>0的解集是____.5.已知圆 C:(x+5)~2+y~2=r~2(r>0)和直线 l:3x+y+5=0.若圆 C 与直线 l 没有公共点,则 r 的取值范围是____。6.已知函数 f(x)是定义在(-∞,+∞)上的偶函数,当 x∈(-∞,0)时,f(x)=x-x~4,则当 x∈(0,
Fill in the blank 1. Calculate: (3n-2) / (4n + 3) = ____. 2. The solution of the equation log_3 (2x-1) = 1 x = _____ 3. The function f (x) = 3x + 5 , the inverse of x∈ [0,1] f -1 (x) = _______. 4. The solution set of inequality (1-2x) / (x + 1)> 0 is ____ 5. Known The circle C: (x + 5) ~ 2 + y ~ 2 = r ~ 2 (r> 0) and the line l: 3x + y + 5 = 0. If the circle C and the line l have no common point, then the value of r The range is ____. It is known that the function f (x) is an even function defined on (-∞, + ∞). When x∈ (-∞, 0), f ,