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  1. ; calculating derivatives
  2.  
  3. (define dx 0.0000001)
  4.  
  5. (define (deriv f)
  6.   (define (f-prime x)
  7.     (/ (- (f (+ x dx)) (f x))
  8.        dx))
  9.   f-prime)
  10.  
  11. (define (cube x) (* x x x))
  12.  
  13. (display ((deriv cube) 2)) (newline)
  14. (display ((deriv cube) 3)) (newline)
  15. (display ((deriv cube) 4)) (newline)
Success #stdin #stdout 0s 42848KB
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stdin
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Standard input is empty
stdout
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12.000000584322379
27.000000848431682
48.00000141358396
https://ideone.com/ult2Qm
language:
Scheme (guile 2.2.4)
created:
7 years ago
visibility:
public

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