Question

Dau coroana!

Se consideră numerele raționale a =-125/8, b=2/5 c=-4/25

b) (b * c) *a
C) a La puterea - 1 : (b *c) ​

Answer 1

Răspuns:

a) (b × c) × a = 1

b) a-¹ : (b × c) = 1

Explicație pas cu pas:

a = - 125/8 ; b = 2/5 ; c = - 4/25

b) (b × c) × a = [2/5 × (- 4/25)] × ( - 125/8) = (- 8/125) × (- 125/8) = 1

c) a-¹ : ( b × c) = (- 125/8)-¹ : [2/5 × (- 4/25)] = - (125/8)-¹ : (- 8/125) = 8/125 : 8/125 = 1