If x is not equal to 1 and `y = 1/(x - 1)`, then which one of the following cannot be the value of y?

If x=1/(1+1/(1+x)) and y=2/(2+1/(1+y)) then which of the following can be the value of X+Y ?

If x^2 - y^2 = 16 and x + y > x - y , then which one of the following could x - y equal ?

If y=(1)/(x^(2)-x-20) then for which values of x the value of y cannot be obtained?

Find the value of the following. x + y when x = 1 and y = -1

If sec ^(-1) x ="cosec" ^(-1) y . State which of the following is the value of ( cos ^(-1) ""(1)/(x)+cos ^(-1) ""(1)/(y )) ?

If x^(ln)[(y)/(z)].y^(ln[xz]^(2)),z^(ln[(x)/(y)])=y^(4ln y) for any x>1,y>1 and z>1, then which one of the following is correct?

If sec^(-1)x = cosec^(-1)y state which of the following is the value of (cos^(-1)(1/x) + cos^(-1)(1/y)) ?

Find the value of ( 1/x + 1/y ) ( 1/x - 1/y )

If f(x) = x/(x-1)=1/y then the value of f(y) is