Q. Solve the given equation system x(z+1)=y2,(z+1)2=xy,x2=y(z+1)
Write System of Equations: Write down the system of equations.⎩⎨⎧x(z+1)=y2(z+1)2=xyx2=y(z+1)
Express y in terms: From the first equation, express y in terms of x and z.y2=x(z+1)y=x(z+1)Note that we consider only the positive square root because if y were negative, squaring it would give a positive result, which would not match the original equation.
Substitute in Second Equation: Substitute the expression for y from Step 2 into the second equation.(z+1)2=xx(z+1)
Square to Eliminate Root: Square both sides of the equation from Step 3 to eliminate the square root.((z+1)2)2=(xx(z+1))2(z+1)4=x2x(z+1)(z+1)4=x3(z+1)
Substitute y in Third Equation: From the third equation, we have x2=y(z+1). Substitute the expression for y from Step 2 into this equation.x2=x(z+1)(z+1)
Square to Eliminate Root: Square both sides of the equation from Step 5 to eliminate the square root.(x2)2=(x(z+1)(z+1))2x4=x(z+1)(z+1)2x4=x(z+1)3
Equations Involving x and z: We now have two equations involving x and z:(z+1)4=x3(z+1)x4=x(z+1)3We can use these equations to find a relationship between x and z.
Divide Second Equation by x: Divide the second equation by x to simplify it, assuming x is not zero.x3=(z+1)3
Equate x and z+1: Since both x3 and (z+1)3 are equal, we can equate x and z+1.x=z+1
Substitute x to find y: Substitute x=z+1 into the first equation to find y.y2=(z+1)(z+1)y2=(z+1)2y=z+1
Substitute x to find z: Now we have x=z+1 and y=z+1. Substitute x=z+1 into the third equation to find z.(z+1)2=(z+1)(z+1)This is a tautology and does not give us new information about z. We need to find another way to determine z.
Substitute x and y in Second Equation: Substitute x=z+1 and y=z+1 into the second equation to find z.(z+1)2=(z+1)(z+1)This is the same tautology as before. We have reached a point where all equations are satisfied for any z. Therefore, the system has infinitely many solutions, where x=y=z+1 for any real number z.
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