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3 years ago

How do I find the value of u ? What are the steps to find the answer anyone knows ? I’ll give you best brainliest

Mathematics

1 answer:

VikaD [51]3 years ago

4 0

Answer:

u=14

5u=70

Step-by-step explanation:

by angle sum property of quadilateral

88+90+112+5u=360

290+5u=360

5u=360-290

5u=70

u=70/5

u=14

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Suppose a and b are both non zero real numbers. Find real numbers c and d such that 1/a+ib= c+id

Thepotemich [5.8K]

$\begin{gathered} c=\frac{a}{a^2+b^2} \\ d=\frac{-b}{a^2+b^2} \end{gathered}$

Explanation

$\frac{1}{a+bi}=c+di$

Step 1

multiplicate by the conjugate

$\begin{gathered} \frac{1}{a+bi}\cdot\frac{a-bi}{a+bi}=\frac{a-bi}{(a+bi)(a-bi)}=\frac{a-bi}{a^2-(bi)^2} \\ \frac{1}{a+bi}\cdot\frac{a-bi}{a+bi}=\frac{a-bi}{(a+bi)(a-bi)}=\frac{a-bi}{a^2-(-b^2)}=\frac{a-bi}{a^2+b^2} \end{gathered}$

notice that

$\begin{gathered} \frac{1}{a+bi}=\frac{a-bi}{a^2+b^2}=\frac{a}{a^2+b^2}-\frac{b}{a^2+b^2}i \\ \frac{a}{a^2+b^2}-\frac{b}{a^2+b^2}i=c+di \\ so \\ \end{gathered}$ $\begin{gathered} c=\frac{a}{a^2+b^2} \\ d=\frac{-b}{a^2+b^2} \end{gathered}$

I hope this helsp you

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1 year ago

What’s the frequency

SCORPION-xisa [38]

Frequency describes the number of waves that pass a fixed place in a given amount of time.

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3 years ago

The vertices of ABC are A(2, -3), B(-3,-5), and C(4,1). For each translation,

Snezhnost [94]

Answer:

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Step-by-step explanation:

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2 years ago

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yaroslaw [1]

step-by-step.

+10=15

Step 1: Simplify both sides of the equation.

x+10=15

Step 2: Subtract 10 from both sides.

x+10−10=15−10

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Step 3: Multiply both sides by 3.

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x)=(3)*(5)

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Answer:

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