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2 years ago

PLEASE HELP ILL GIVE BRAINLIEST PLEASE PLEASE PLEEEEEEEAAAAASE

Mathematics

1 answer:

Nesterboy [21]2 years ago

8 0

The recursive formula is $a_n= a_{n-1} -5$ .

<h3>What is Arithmetic Progression?</h3>

A set of numbers is an arithmetic progression (AP) or an arithmetic sequence such that the difference between successive words is unchanged.

Given:

A(n)=(-1)+(n-1)(-5)

A(n) = -1 - 5n + 5

A(n) = 4-5n

n=1

A(1)= 4-5= -1

n=2,

A(2) = -6

n=3

A(3)= -11

Hence, the recursive formula is $a_n= a_{n-1} -5$ .

Learn more about this concept here:

brainly.com/question/20113523

#SPJ1

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3 years ago

Simplify (Are all division) 2+4i 3i 3+2i 4+i 2i^11

Alla [95]

$We\ know:\ i=\sqrt{-1}\to i^2=-1$

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$\dfrac{3+2i}{4+i}=\dfrac{3+2i}{4+i}\cdot\dfrac{4-i}{4-i}=\dfrac{(3+2i)(4-i)}{4^2-i^2}\\\\=\dfrac{(3)(4)+(3)(-i)+(2i)(4)+(2i)(-i)}{16-(-1)}=\dfrac{12-3i+8i-2i^2}{16+1}\\\\=\dfrac{12+5i-2(-1)}{17}=\dfrac{12+5i+2}{17}=\dfrac{14+5i}{17}=\dfrac{14}{17}+\dfrac{5}{17}i$

$2i^{11}=2i^{10+1}=2i^{10}i^1=2i^{2\cdot5}i=2i(i^2)^5=2i(-1)^5=2i(-1)=-2i$

$Used:\ (a+b)(a-b)=a^2-b^2$

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3 years ago

I NEED HELP PLZZ HELP ASAP i will mark you as brainiest

12345 [234]

Step-by-step explanation:

1+1=78

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3 years ago

Christine owns 9 hair bands and additional hair bands are 2 for a dollar. How much money does she need to spend on hair bands in

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Answer: $20

Step-by-step explanation:

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3 years ago

Write the equation of the line in the slope-intercept form. M=4/5, y-intercept (0,1)

netineya [11]

Answer:

y=4/5x+1

Step-by-step explanation:

y=mx+b

m is the slope
b is the y-intercept

m= 4/5

b= 1 (0,1) y-value

Equation:

y=4/5x+1

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3 years ago