Math, asked by sawantbhosalepavansh, 2 months ago

if f(x)=x+2/4x-3 & t=2+3x/4x-1 show that f(t)=x​

Answers

Answered by MaheswariS
1

\textbf{Given:}

\mathsf{f(x)=\dfrac{x+2}{4x-3}}

\mathsf{t=\dfrac{2+3x}{4x-1}}

\textbf{To show:}

\mathsf{f(t)=x}

\textbf{Solution:}

\textsf{Consider,}

\mathsf{f(t)}

\mathsf{=f\left(\dfrac{2+3x}{4x-1}\right)}

\mathsf{=\dfrac{\dfrac{2+3x}{4x-1}+2}{4\left(\dfrac{2+3x}{4x-1}\right)-3}}

\mathsf{=\dfrac{\dfrac{2+3x+8x-2}{4x-1}}{\left(\dfrac{8+12x}{4x-1}\right)-3}}

\mathsf{=\dfrac{\dfrac{2+3x+8x-2}{4x-1}}{\dfrac{8+12x-12x+3}{4x-1}}}

\mathsf{=\dfrac{\dfrac{11x}{4x-1}}{\dfrac{11}{4x-1}}}

\mathsf{=\dfrac{11x}{11}}

\mathsf{=x}

\implies\boxed{\mathsf{f(t)=x}}

\textbf{Find more:}

If f(x)=log10x & g(x)=100x find (fog) (x) & (gof) (x)​

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