sabendo que a é = (2 sobre 3) elevado a -1 e b é = -5 sobre 2 calcule o que se pede em seu caderno
a a-b
b a:b
c a.b²
d (*a+b)²
ajudem
Soluções para a tarefa
Respondido por
47
a=(2/3)^(-1)
a=1/(2/3)
a=3/2
b=-5/2
a)
a-b = 3/2-(-5/2) = 3/2+5/2 = (3+5)/2 = 8/2 = 4
b)
a/b = (3/2)/(-5/2) = (3/2)·(2/-5) = 3/-5 = -3/5
c)
a·b² = (3/2)·(-5/2)² = (3/2)·(25/4) = (3·25)/(2·4) = 75/8
d)
(a+b)² = (3/2+(-5/2))² = (3/2-5/2)² = (-2/2)² = (-1)² = 1
a=1/(2/3)
a=3/2
b=-5/2
a)
a-b = 3/2-(-5/2) = 3/2+5/2 = (3+5)/2 = 8/2 = 4
b)
a/b = (3/2)/(-5/2) = (3/2)·(2/-5) = 3/-5 = -3/5
c)
a·b² = (3/2)·(-5/2)² = (3/2)·(25/4) = (3·25)/(2·4) = 75/8
d)
(a+b)² = (3/2+(-5/2))² = (3/2-5/2)² = (-2/2)² = (-1)² = 1
Respondido por
12
a = (2/3)^-1 = (1/1) /(2/3)¹ = 1/1 * 3/2 = 3/2 ***
b = (-5/2)
a) 3/2 - ( -5/2) = 3/2 + 5/2 = 8/2 = 4 *****
b) ( 3/2) : (-5/2) = ( 3/2) * (-2/5) = - 6/10 = - 3/5 ***
c) a * b² = (3/2) * (-5/2)² = ( 3/2)( 25/4) = 75/8 ***
d )( a + b)² = [( 3/2 + ( -5/2)]² = ( 3/2 - 5/2)² = (-2/5 )² = 4/25 ****
b = (-5/2)
a) 3/2 - ( -5/2) = 3/2 + 5/2 = 8/2 = 4 *****
b) ( 3/2) : (-5/2) = ( 3/2) * (-2/5) = - 6/10 = - 3/5 ***
c) a * b² = (3/2) * (-5/2)² = ( 3/2)( 25/4) = 75/8 ***
d )( a + b)² = [( 3/2 + ( -5/2)]² = ( 3/2 - 5/2)² = (-2/5 )² = 4/25 ****
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