मराठी

If f(x) = x+34x−5,g(x)=3+5x4x−1 then verify that (fog)(x) = x. - Mathematics and Statistics

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प्रश्न

If f(x) = `(x+3)/(4x−5) , "g"(x) = (3+5x)/(4x−1)` then verify that `("fog") (x)` = x.

बेरीज
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उत्तर

f(x) = `(x+3)/(4x−5) , "g"(x) = (3+5x)/(4x−1)`

`("fog")(x) = "f(g"(x))`

= f`((3+5x)/(4x-1))`

=`((3+5x)/(4x-1)+3)/(4((3+5x)/(4x-1))-5`

= `(3+5x+12x - 3)/(12+20x-20x+5)`

= `(17x)/17`

= x

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पाठ 2: Functions - Miscellaneous Exercise 2 [पृष्ठ ३२]

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बालभारती Mathematics and Statistics 1 (Commerce) [English] Standard 11 Maharashtra State Board
पाठ 2 Functions
Miscellaneous Exercise 2 | Q 9 | पृष्ठ ३२

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