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If f(x) =2x−15x−2,x≠25 Verify whether (fof) (x) = x - Mathematics and Statistics

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प्रश्न

If f(x) =` (2x−1)/ (5x−2) , x ≠ 2/5` Verify whether (fof) (x) = x

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उत्तर

(fof) (x) = f(f(x))

= `"f" ((2x-1)/(5x-2))`

= `(2((2x-1)/(5x-2))-1)/(5((2x-1)/(5x-2))-2)`

= `(("4x" - 2 - 5"x" + 2)/(5"x" - 2))/((10"x" - 5 - 10"x" + 4)/(5"x" - 2))`

= `(4x-2-5x+2)/(10x-5-10x+4)`

= `(-x)/(-1)`

= x

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  क्या इस प्रश्न या उत्तर में कोई त्रुटि है?
अध्याय 2: Functions - Miscellaneous Exercise 2 [पृष्ठ ३२]

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बालभारती Mathematics and Statistics 1 (Commerce) [English] Standard 11 Maharashtra State Board
अध्याय 2 Functions
Miscellaneous Exercise 2 | Q 8 | पृष्ठ ३२
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