Which of the following equations has solution in the set of integers? (a) `x^2=1`

Which of the following equations has x=2 as a solution ?

Which of the following equations has the solution (1,-1)?

Which of the following equations does not have a solutions is integers ?

Which of the following equations has the solution of (2, -3) ?

Which of the following is the solution set of the equations sin^(-1) x = cos^(-1) x + sin^(-1) ( 3x -2) ?

Which of the following is the solution set of the equation sin^(-1)x=cos^(-1)x+sin^(-1)(3x-2)

Which of the following is the solution set of the equation sin^-1 x = cos ^-1 x+ sin ^-1(3x-2)

Which of the following is the solution set of the equation 2cos^(-1)x=cot^(-1)((2x^2-1)/(2xsqrt(1-x^2)))?

Which one of the following is a set of solution of the equation x^(sqrt( x)) = root (n ) (x^(x)) , if n is a positive integer?

Which of the following differential equations has y=c_1e^x+c_2e^-x as the general solution ?