मराठी

If f(x) = y = ax-bcx-a, then prove that f(y) = x. - Mathematics

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प्रश्न

If f(x) = y = `(ax - b)/(cx - a)`, then prove that f(y) = x.

बेरीज
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उत्तर

We have, f(x) = y = `(ax - b)/(cx - a)`

∴ f(y) = `(ay - b)/(cy - a)`

= `(a((ax - b)/(cx - a)) - b)/(c((ax - b)/(cx - a)) - a)`

= `(a(ax - b) - b(cx - a))/(c(ax - b) - a(cx - a))`

= `(a^2x - ab - bcx  + ab)/(acx - bc - acx + a^2)`

= `(a^2x - bcx)/(a^2 - bc)`

= `(x(a^2 - bc))/((a^2 - bc))`

∴ f(y) = x

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पाठ 2: Relations and Functions - Exercise [पृष्ठ ३०]

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एनसीईआरटी एक्झांप्लर Mathematics [English] Class 11
पाठ 2 Relations and Functions
Exercise | Q 23 | पृष्ठ ३०
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