A b b c = (b - c)(c - a)(a - b)(a+b+c)
la 63 c²
la-b-c
2a
2b
b-c-a
)
1 2a
2b
= (a +b+c)
c-a-b
이
2.
2c
b
|a + b + 20
a
b
b+c+2a
= 2(a +
C с​

40 is the final : )

0.02

step-by-step explanation:

time of 9 192 631 770 periods of the radiation corresponding to the transition between the 2 hyperfine levels of the ground state of the caesium 133 atom at 0 k (but other seconds are sometimes used in astronomy)