1.

If alpha beta are the roots of x+1/x=10/3,then relation between alpha and beeta.​

Answer»

\large{\underline{\underline{\red{\sf{GIVEN:}}}}}

  • \tt{\alpha \:and\: \beta \:are\: zeroes \:of \:equ^{n}}
  • \tt{The\:equ^{n}\:is\:x+\dfrac{1}{x}=\dfrac{10}{3}}

\large{\underline{\underline{\red{\sf{TO\:FIND:}}}}}

  • \tt{Relation\: between\:\alpha\:and\:\beta}

\large{\underline{\underline{\red{\sf{ANSWER:}}}}}

\sf{Given \:<klux>QUADRATIC</klux> \:<klux>EQUATION</klux>\: is \:x +\dfrac{ 1}{x }=\dfrac{ 10}{3}}.

So , firstly let's simplify the equation ,

\tt{\implies x+\dfrac{1}{x}=\dfrac{10}{3}}

\tt{\implies \dfrac{x^2+1}{x}=\dfrac{10}{3}}

\tt{\implies 3(x^2+1)=10x}

\tt{\implies 3x^2+3=10x }

\tt{\implies 3x^2-10x+3=0}

Now we CONVERTED this equⁿ in standard FORM of a quadratic equation that is ax²+bx+c .

Now we know a relationship between zeroes and COEFFICIENTS as ,

\large{\underline{\boxed{\purple{\rm{\leadsto Product\:of\: Zeroes=\dfrac{Coefficient\:of\: constant\:term}{Coefficient\:of\:x^2}=\dfrac{c}{a}}}}}}

Now here zeroes are alpha and beta.

Here ,

  • \orange{\sf{Coefficient\:of\:c\:=\:3}}
  • \orange{\sf{Coefficient\:of\:x^2\:=\:3}}

\tt{\implies \alpha\beta=\dfrac{3}{3}}

\tt{\implies \alpha\beta=1}

\underline{\green{\tt{\underset{\purple{Required\: relationship}}{\underbrace{\dag\alpha=\dfrac{1}{\beta}}}}}}



Discussion

No Comment Found

Related InterviewSolutions