Question

va rog ex 22. 23. Dau coroana! Please​

Answer 1

Explicație pas cu pas:

22. 1) a\3=b\2 putem scrie ca:

2a=3b |×7

14a=21b

2) (14a-21b+1)^2013=1

14a=21b atunci:

1^2013=1 (A)

23. Amlific cu numarul de la numitor

(2a+3b-5c)^2013=0

0^2013=0 (A)

Answer 2

$22. \: \: \frac{a}{2} = \frac{b}{3}$

$a \times 3 = 2 \times b$

$(14 a - 21b + 1)^{2013} = 1$

$(14a - 7 \times 3b + 1)^{2013} = 1$

$(14a - 14a + 1)^{2013} = 1$

$(0 + 1)^{2013} = 1$

${1}^{2013} = 1$

$23. \: \: \frac{a}{2} = \frac{b}{3} = \frac{c}{5} = k$

$a = 2k \\ b = 3k \\ c = 5k$

$(a + b - c)^{2013} = 1$

$(2k + 3k - 5k)^{2013} = 1$

${0}^{2013} = 1$