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Show that if f :R - {(7)/(5)} to R - {(3...

Show that if `f :R - {(7)/(5)} to R - {(3)/(5)}` is defined by `f (x) = (3x +4)/( 5x -7) and g :R - {(3)/(5)} to R - {(7)/(5)}` is defined by `g (x) = (7x +4)/(5x -3),` then fog` = I _(A) and ` gof `=I _(B),` where, `A = R - {(3)/(5)}, B = R -{(7)/(5)},I_(A)(x) =x, AA x in A, I_(B) (x) =x , AA x in B` are called identity functions on sets A and B, respectively.

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`I _(A)`
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