potência Flashcards

1
Q

potência de i =

A

i²= -1 -> i = √-1

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2
Q

Se i = -1 : √-16 =

A

4.-1 = 4.i

já que n existe +4.-4 como raíz quadrada

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3
Q

A cada __número ( 0-1-2-3…) , o i^x =

obs: o “cada número “ = x - potência de i

A

4 número, o i^x = i

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4
Q

Considerando o principal propriedade do i , quanto que vale i²²¹²

A

A cada 4 número i^x = i

2211/4= 552 sobrando 3
552x i^4 x i³ : i^4 = 1 e i³ = -1.i : 1.-1i = -1i

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5
Q

( 1+ i )² =

A

1 + 2i + i²
Como i² = (√-1)² = -1

1+2i + (-1) = 2i

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6
Q

(1-i)²

A

1-2i+ i²

i² = -1

1-2i + (-1) = -2i

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7
Q

( i+1)^200

A

(( i+ 1 )^100)²

Como ( i+1)² = 2i -> (2i)^100
2^100 . i^100

i^100 = 100/4= 25 sobra 0 -> i^4 25x . i^0 = 1 . 1 = 1

-> 2^100 . 1

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8
Q

( i - 1)^250

A

(( i - 1)^125)²

Como ( i -1) = -2i -> -2i^125 . i ^125
i^125 : 125/4= 21 sobra 4 -> i^4 21x . i^4 = 1

( número negativo ^ ímpar = negativo ) :
-2^125

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