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Write (1+2i) /(2-i) in form x+iy

(1+2i) (2+i)/(2+i)(2-i) = (2-2+4i+i)/5 = 5i/5 = i
RM
3387 Views

What are the German cases, and when do I use them?

There are four cases in the German language: nominative, accusative, dative, and genitive. There are different rules on when to use each specific case.Nominative: The nominative case is used for the subject ...
JS
Answered by Jennifer S. • German tutor
2281 Views

How would you solve the inequality x^2-2x-8 >= 0?

We are looking for all the x values for which this equation holds. We know how to solve quadratic equations without the inequalities, and that is the first step here! So let's forget about the greater than p...
KG
Answered by Kirsty G. • Maths tutor
20813 Views

Intergrate 8x^3 + 6x^(1/2) -5 with respect to x

2x 3 + 4x 3/2 - 5x + cGeneral rule for integration is increase the power by 1 then divide by the new powerAlways remember +C !!!!!!!
TM
Answered by Tia-Marie M. • Maths tutor
3721 Views

f(x)=sin(2x) for 0<x<pi, find the values of x for which f is a decreasing function

A decreasing function means that its instantaneous slope ( rate of change) is negative and the function tends to smaller values of y.There are two approaches to this. One is graphical, as sin(x) is a recogni...
YM
Answered by Yago M. • Maths tutor
3248 Views