Question

Efetue as operações indicadas:
a) 10^15 x 10-¹¹
b) 2x10^-6 x 4x10 -²
c) 10^10 : 10^4
d) 10^15 : 10-¹¹
e) 5,7x10^-4 + 2,4x10^-4
f) 6,4 x 10^7 - 8,1 x 10^7
g) 4,8x10^-3 : 1,2x10^4
(Me respondam por favor, é urgente!)
(Esse sinal aqui ^ indica elevado)
(Coloque o cauculo por favor)

Answer 1

Antes de responder citarei as propriedades das operações com potências

• $a^x*a^y =a^x^+^y$

• $\frac{a^x}{a^y} = a^x^-^y$

• $a.10^x+b.10^x = (a+b)*10^x$

Agora resolvendo:

$10^1^5*10^-^1^1 = 10^1^5^+^(^-^1^1^) = 10^4\\\\\\2.10^-^6.4.10^-^2 = 8.10^-^6^+^(^-^2^) = 8.10^-^8\\\\\\\frac{10^1^0}{10^4} = 10^1^0^-^4 = 10^6\\\\\\\frac{10^1^5}{10^-^1^1} = 10^1^5^-^(^-^1^1^) = 10^2^6\\\\\\5,7.10^-^4+2,4.10^-^4=8,1.10^-^4\\\\\\6,4.10^7-8,1.10^7 = -1,7.10^7\\\\\\ \frac{4,8.10^-^3}{1,2.10^4} = 4.10^-^3^-^4 = 4.10^-^7$