40 поинтов , решить 1 задание

a,b цифры

0. (a) = a/9

0. (b) = b/9

0. a = a/10

0. b = b/10

a. (a) = a + 0. (a) = a + a/9 = 10/9a

b. (b) = b + 0. (b) = b + b/9 = 10/9b

1.

(a. (a) + b. (b))/(0. (a) + 0. (b)) = (10/9 a + 10/9b) / (a/9 + b/9) = 10/9(a + b) / 1/9(a + b) = 10/9 * 9 = 10

b

2.

(a. (a) + b. (b))/(0. a + 0. b) = (10/9a + 10/9b)/(a/10 + b/10) = 10/9(a + b) / 1/10(a + b) = 100/9

e)

3.

(0. a - 0. b) / (0. (a) - 0. (b)) = (a/10 - b/10) / (a/9 - b/9) = 1/10(a - b) / 1/9(a - b) = 9/10 = 0. 9

d)