問題1.21 > (smallest-divisor 199) 199 > (smallest-divisor 1999) 1999 > (smallest-divisor 19999) 7 問題1.22 (define (search-for-primes n m) (cond ((< m n)(newline) 'done) ((timed-prime-test n)(search-for-primes (+ n 1) m)) (else (search-for…