If `x^2+1/x^2=2`,find the value of `(x^4+1/x^4)`

If x+1/x=4, find the values of x^2+1/(x^2)

If x=sqrt 2 +1 , find the value of x^4+1/x^4

If x-1/x=3,\ find the values of x^2+1/(x^2)a n d\ x^4+1/(x^4)dot

If x+1/x=sqrt(5) , find the values of x^2+1/(x^2) and x^4+1/(x^4)

If x- (1)/ (x ) = 4 , find the value of : x^(2) + (1)/( x^(2))

If 1/x - 1/y=4 , find the value of (2x+4xy-2y)/(x-y-2xy) .

Find the value of lim_(x->oo)(2-1/x+4/x^2)

If x=(4/5)^(-2)-:(1/4)^2, find the value of x^(-1)dot

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=(sqrt(3)+1)/2, find the value of 4x^3+2x^2-8x+7.