Let f and g be two one-argument functions. The composition f after g is defined to be the function x → f(g(x)). Define a procedure compose that implements composition. For example, if inc is a procedure that adds 1 to its argument.
((compose square inc) 6) 49
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(define (inc x) (+ x 1)) (define (square x) (* x x)) (define (double x) (* x 2)) (check-equal? ((compose square inc) 6) 49) (check-equal? ((compose inc double) 6) 13) (check-equal? ((compose double inc) 6) 14)