Dado os números complexos
Z= 3 - 2i
K= 2-i
Y=5i
T=4+3i
W=5+4i
resolva as operações
a) Z.K.Y
b) 2.y.t
c) w/k
d) k/w
e) k/t
l) z.w/k+w.k/z
Respostas
respondido por:
0
Z = 3 - 2i K = 2 - i Y = 5i T = 4 + 31 W = 5 + 4i
Z.K.Y = (3 - 2i)(2 - i)(5i)
Z.K.Y = (6 - 3i - 4i + 2i²)(5i)
Z.K.Y = ( 6 - 7i + 2(-1) ) (5i)
Z.K.Y = (6 - 7i - 2)(5i)
Z.K.Y = (4 - 7i)(5i)
Z.K.Y = 20i - 35i²
Z.K.Y = 20i - 35.(-1)
Z.K.Y = 20i + 35
===================================================
2.Y.T = 2.5i.(4 + 3i)
2.Y.T = 10i.(4 + 3i)
2.Y.T = 40i + 30i²
2.Y.T = 40i + 30.(-1)
2.Y.T = 40i - 30
========================================================
W (5 + 4i) (2 + i) 10 + 5i + 8i + 4i² 10 + 13i + 4(-1)
--------- = ---------- . --------- = ----------------------- = --------------------- =
K (2 - i) (2 + i) 4 - i² 4 - (-1)
10 + 13i - 4 6 + 13i 6 13
------------------ = ------------ = ------- + ----- i
4 + 1 5 5 5
=========================================================
K (2 - i) (5 - 4i) 10 - 8i - 5i + 4i² 10 - 13i + 4(-1)
------ = ----------- . ----------- = ---------------------- = ---------------------- =
W (5 + 4i) (5 - 4i) 25 - 16i² 25 - 16(-1)
10 - 13i - 4 6 - 13i 6 13
--------------- = ------------ = ------- - ------ i
25 + 16 41 41 41
===================================================
K (2 - i) (4 - 3i) 8 - 6i - 4i + 3i² 8 - 10i + 3(-1)
------ = ----------- . ----------- = -------------------- = ------------------- =
T (4 + 3i) (4 - 3i) 16 - 9i² 16 - 9(-1)
8 - 10i - 3 5 - 10i 5(1 - 2i) 1 - 2i 1 2
-------------- = ----------- = ----------- = --------- = ----- - ----- i
16 + 9 25 25 5 5 5
======================================================
Z.W W.K Z²W + WK² W(Z² + K²) (5 + 4i)(3 - 2i)²+(2- i)²
------- + -------- = ----------------- = ----------------- = --------------------------- =
K Z K.Z K.Z (2 - i)(3 - 2i)
( 5 + 4i)(9 - 12i + 4i² + 4 - 4i + i²) (5 + 4i)(13 - 16i + 5i²)
------------------------------------------ = --------------------------------------------- =
6 - 4i - 3i + 2i² 6 - 7i +2(-1)
(5 + 4i)( 13 - 16i + 5(-1)) (5 + 4i)(13 - 16i - 5) (5 + 4i)(8 - 16i)
-------------------------------- = ---------------------------- = ---------------------- =
6 - 7i - 2 4 - 7i 4 - 7i
40 - 80i + 32i - 64i² 40 - 48i - 64(-1) 40 - 48i + 64
------------------------- = ---------------------- = -------------------- =
4 - 7i 4 - 7 i 4 - 7i
(104 - 48i) (4 + 7i) 416 + 728i - 192 - 336i² 224 + 728i - 336(-1)
-------------- . ------------ = --------------------------------- = ------------------------------ =
(4 - 7i) (4 + 7i) 16 - 49i² 16 - 7(-1)
224 + 728i + 336 570 728
----------------------- = ---------- + -------- i
16 + 7 23 23
Z.K.Y = (3 - 2i)(2 - i)(5i)
Z.K.Y = (6 - 3i - 4i + 2i²)(5i)
Z.K.Y = ( 6 - 7i + 2(-1) ) (5i)
Z.K.Y = (6 - 7i - 2)(5i)
Z.K.Y = (4 - 7i)(5i)
Z.K.Y = 20i - 35i²
Z.K.Y = 20i - 35.(-1)
Z.K.Y = 20i + 35
===================================================
2.Y.T = 2.5i.(4 + 3i)
2.Y.T = 10i.(4 + 3i)
2.Y.T = 40i + 30i²
2.Y.T = 40i + 30.(-1)
2.Y.T = 40i - 30
========================================================
W (5 + 4i) (2 + i) 10 + 5i + 8i + 4i² 10 + 13i + 4(-1)
--------- = ---------- . --------- = ----------------------- = --------------------- =
K (2 - i) (2 + i) 4 - i² 4 - (-1)
10 + 13i - 4 6 + 13i 6 13
------------------ = ------------ = ------- + ----- i
4 + 1 5 5 5
=========================================================
K (2 - i) (5 - 4i) 10 - 8i - 5i + 4i² 10 - 13i + 4(-1)
------ = ----------- . ----------- = ---------------------- = ---------------------- =
W (5 + 4i) (5 - 4i) 25 - 16i² 25 - 16(-1)
10 - 13i - 4 6 - 13i 6 13
--------------- = ------------ = ------- - ------ i
25 + 16 41 41 41
===================================================
K (2 - i) (4 - 3i) 8 - 6i - 4i + 3i² 8 - 10i + 3(-1)
------ = ----------- . ----------- = -------------------- = ------------------- =
T (4 + 3i) (4 - 3i) 16 - 9i² 16 - 9(-1)
8 - 10i - 3 5 - 10i 5(1 - 2i) 1 - 2i 1 2
-------------- = ----------- = ----------- = --------- = ----- - ----- i
16 + 9 25 25 5 5 5
======================================================
Z.W W.K Z²W + WK² W(Z² + K²) (5 + 4i)(3 - 2i)²+(2- i)²
------- + -------- = ----------------- = ----------------- = --------------------------- =
K Z K.Z K.Z (2 - i)(3 - 2i)
( 5 + 4i)(9 - 12i + 4i² + 4 - 4i + i²) (5 + 4i)(13 - 16i + 5i²)
------------------------------------------ = --------------------------------------------- =
6 - 4i - 3i + 2i² 6 - 7i +2(-1)
(5 + 4i)( 13 - 16i + 5(-1)) (5 + 4i)(13 - 16i - 5) (5 + 4i)(8 - 16i)
-------------------------------- = ---------------------------- = ---------------------- =
6 - 7i - 2 4 - 7i 4 - 7i
40 - 80i + 32i - 64i² 40 - 48i - 64(-1) 40 - 48i + 64
------------------------- = ---------------------- = -------------------- =
4 - 7i 4 - 7 i 4 - 7i
(104 - 48i) (4 + 7i) 416 + 728i - 192 - 336i² 224 + 728i - 336(-1)
-------------- . ------------ = --------------------------------- = ------------------------------ =
(4 - 7i) (4 + 7i) 16 - 49i² 16 - 7(-1)
224 + 728i + 336 570 728
----------------------- = ---------- + -------- i
16 + 7 23 23
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