1.) 1/i^38
2.) -1/i^75
3.) (6-5i)(7+8i)
4.) (3i=4)(5-6i)
2006-09-03 13:58:47 · 4 answers · asked by mac 2 in Education & Reference ➔ Homework Help
1) i =sqrt(-1)
i^2 = -1
i^4 = 1
i^38 = (i^2)^19 = -1^19 = -1.
1/i^38 = 1/(-1) = -1
2) i^75 = i^74*i. i^74 = -1. i^75 = -i.
-1/-i = 1/i = -1*-1/i = -i.
3) (6-5i)(7+8i) = 42-35i+48i + 40 = 82+13i
4) (3i-4)(5-6i) = 15i +18 -20 +24i = -2+39i.
2006-09-03 14:08:10 · answer #1 · answered by Anonymous · 1⤊ 0⤋
I really wish that I could! I do not even understand the question! Perhaps if you explain what it is you are looking for someone could help you! Best Wishes!
2006-09-03 21:31:28 · answer #2 · answered by zoril 7 · 0⤊ 0⤋
Try math.com
They have a ton of good info.
2006-09-03 21:05:21 · answer #3 · answered by Jamie M 2 · 1⤊ 0⤋
u guys really gotta do ur own hw, u noe.
2006-09-03 22:41:47 · answer #4 · answered by LYY 4 · 0⤊ 0⤋