Question

va rog sa ma ajutati la ex e7 si punctul c de sus​

Answer 1

Răspuns:

Explicație pas cu pas:

[ - (125-21)90 + (14-1)/90] * [12 - (115-11)/90 - (184-18)/90]

[-104/90+13/90] * [12 - 104/90 - 166/90]

-91/90 * [12-270/90]

-91/90 * (12-3) = -91/90 * 9 = -91/10

a. x = [(56-5)/9 - 15/4 + 3/4] * 3/2

x = [ 51/9 - 12/4] * 3/2

x = (51/9 - 3) * 3/2

x = (51-27)/ 9 *3/2

x = 24/9 * 3/2

x = 4

y = (1/12)⁻¹ + √116,64 : 27/10

y = 12 + 10.8 * 10/27

y = 12 + 108/10 * 10/27

y = 12 + 4

y = 16

MA = (4+16)/2 = 10

MG = √4*16 = 2*4 = 8

b. x = (18/5)⁻¹ + √75/90 * 3/90

x = 5/18 + √225

x = 5/18 + 15

x = 275/15 = 55/3

y = 7/2√3 * [-0.125+1]⁻¹

y = 7/ 2√3 * 0.875⁻¹

y = 7/2√3 * 1000/875

y = 7/2√3 * 8/7 = 4/√3

MA = (55/3 + 4/√3) / 2 = (55+4√3)/6

MG = 55/3 * 4√3/3 = √220√3/9 =