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Setler [38]
3 years ago
9

Which expression represents the number 5i4+2i3+8i2+−4  rewritten in a+bi  form?

Mathematics
2 answers:
aniked [119]3 years ago
8 0
Remember
i²=-1 so
i³=-i
i⁴=1

so
5i⁴+2i³+8i²-4
5(1)+2(-i)+8(-1)-4
5-2i-8-4
-7-2i is the form
Vinvika [58]3 years ago
6 0

Answer:

Thats not the answer. I need help with this answer too.

These are the answers we're supposed to choose from:

−3+2i

5+0i

5−2i

​−3−4i

−3+0i

Which one is it?

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The graph of function f is shown above. if g(x)=x^2/f(x) what is the value of g'(1)?​
Alla [95]

Answer:

Step-by-step explanation:

Find the equation of the segment going from (0,-5) to (3,7)

y intercept = -5

Slope = (-5 - 7) / (0 - 3) = -12/-3 = 4

equation: y = 4x - 5

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f(x)=  (4x - 5)

g(x) = x^2 / (4x - 5)

g'(x) = x^2 * (4x - 5)^-1

g'(x) = 2x*(4x - 5)^-1  + (-1) *4* x^2 (4x - 5)^-2

I will leave that monster the way it is and just find g'(1)

g'(1) = 2(1) * (4(1) - 5)^-1    +    (-1) (1)^2 *4* (4(1) - 5)^-2

g'(1) = 2(1) * (-1)^-1             +    (-1) (1)^2 *4 * (-1)^2

g'(1) = -2                      +        (-1) (1)^2 (4)

g'(1) = - 2                     +        (-1) (1)^2 (4)

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7 0
3 years ago
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Sonja [21]

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Subtract the 10% from the original sum

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=$179.99

6 0
3 years ago
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