Question

y=1/корень x2-3; y=ln(1-4x2)

Answer 1

$y=frac{1}{sqrt{x^2-3}}\\OOF:; x^2-3>0\\(x-sqrt3)(x+sqrt3)>0\\+ + + +(-sqrt3)- - - - (sqrt3)+ + + + +\\xin (-infty,-sqrt3)U(sqrt3,+infty)\\2); y=ln(1-4x^2)\\OOF:; 1-4x^2>0\\(1-2x)(1+2x)>0\\- - - - - (-frac{1}{2})+ + + + + +(frac{1}{2})- - - - - - \\xin (-frac{1}{2},frac{1}{2})$