If `| [ 3 , 4 ] , [ x , 1 ] | = | [ 3 , 2 ] , [ 4 , 1 ] |` ; then find the value of x

If | [ x , 2 , 4 ] , [ 3 , -1 , 2 ] , [ 4, 5 , 1 ] | = 0 , find the value of x

4^(x-1)=3^(x) then find the value of x

if 3^(x)=4^(x-1) then find the value of x

If |[2,3,2],[x,x,x],[4,9,1]|+3=0 , then find the value of x.

If x+1/x=3 find the value of x^4+1/x^4

If 1/(2!) + 1/(3!) = x/(4!) , find the value of x

If tan ^(-1)x=(3)/(4), then find the value of cos^(-1)x

If 2x+1,3x+2 and 4x+3 are in A.P.then find the value of x'.

If |[1,x,x^2] , [x,x^2,1] , [x^2,1,x]|=3 then find the value of |[x^3-1, 0, x-x^4] , [0,x-x^4, x^3-1] , [x-x^4, x^3-1, 0]|

If x^4 + (1)/(x^4) =727 , then find the value of x^3 - (1)/(x^3)