[3],[7],[1],[1],[1],[oo]

If the function, f:[1,oo]to [1,oo] is defined by f(x)=3^(x(x-1)) , then f^(-1)(x) is

Range of f(x) =1/(1-2cosx) is (1) [1/3,1] (2) [-1,1/3] (3) (-oo,-1]uu[1/3,oo) (4) [-1/3,1]

For x^(2)-(a+3)|x|+4=0 to have real solution,the range of a is (-oo,-7]uu[1,oo) b.(-3,oo) c.(-oo,-7)d*[1,oo)

For x^2-(a+3)|x|+4=0 to have real solutions, the range of a is a. (-oo,-7]uu[1,oo) b. (-3,oo) c. (-oo,-7) d. [1,oo)

For x^2-(a+3)|x|=4=0 to have real solutions, the range of a is a (-oo,-7]uu[1,oo) b (-3,oo) c (-oo,-7] d [1,oo)

For x^2-(a+3)|x|+4=0 to have real solutions, the range of a is (-oo,-7]uu[1,oo) b. (-3,oo) c. (-oo,-7) d. [1,oo)

For x^2-(a+3)|x|-4=0 to have real solutions, the range of a is a) (-oo,-7]uu[1,oo) b) (-3,oo) c) (-oo,-7] d) [1,oo)

For x^2-(a+3)|x|+4=0 to have real solutions, the range of a is a. (-oo,-7]uu[1,oo) b. (-3,oo) c. (-oo,-7) d. [1,oo)

For x^(2)-(a+3)|x|=4=0 to have real solutions,the range of a is (-oo,-7]uu[1,oo)(-3,oo)(-oo,-7][1,oo)

Range of f(x)=(1)/(1-2cos x) is (1)[(1)/(3),1] (2) [-1,(1)/(3)](3)(-oo,-1]uu[(1)/(3),oo)(4)[-(1)/(3),1]