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A function f (-3 , 7) to R is defined as...

A function `f (-3 , 7) to R` is defined as follows
`f (x) = {{:( 4 x^(2) + 1 , ,-3 le x lt 2) , (3x - 2 , ,2 le x le 4) , (2x + 3 , ,4 lt x lt 7):}}`
Find (i) 5 f(1) - 3 f(-2) (ii) 3f (-3) + 4 f (iii) `(7 f (3) - f (-1))/(2 f (6) - f(1))`

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