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Shalnov [3]
3 years ago
7

Write an equation to represent the N'th term of the sequence (2,-1.-4,-7,...)

Mathematics
1 answer:
mr_godi [17]3 years ago
7 0

Answer: a(n) = 5 - 3n

the sequence has:

a1 = 2

a2 = -1

a3 = -7

.........

we can see that: a2 - a1 = a3 - a2 = -3

=> the sequence is a  arithmetic sequence

=> the distance between the numbers is d = -3

because this sequence is a  arithmetic sequence

=> a(n) = a1 + (n - 1)d = 2 + (n - 1).(-3) = 5 - 3n

Step-by-step explanation:

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Step-by-step explanation:

= -4 + 12 + (-9)

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2 years ago
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Y2 = 4

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ΔY = 3

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y = 0.75x + 0.25

When x=0, y = 0.25

When y=0, x = -0.33333333333333

OR

X2 = -3

Y2 = -2

ΔX = -4

ΔY = -3

θ = 216.86989764584°

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3 years ago
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If you know the diameter of a circle,
arsen [322]

Step-by-step explanation:

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Step 1: converted diameter to radius.

diameter = 2 radius

In other way of writing, radius = \frac{1}{2} diameter.

Step 2: substitute radius into the formula.

Area of a circle = π(\frac{1}{2}d)²

Step 3: substitute π into the formula.

some question is given the value of π), if not substitute 3.14 for π.

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Step 4: substitute d into the formula, then we can solve its area.

b. a. Circumference of a circle = 2πr, where r means radius.

Step 1: converted diameter to radius.

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In other way of writing, radius = \frac{1}{2} diameter.

Step 2: substitute radius into the formula.

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Step 3: substitute π into the formula.

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C = 2(3.14)(\frac{1}{2}d)

Step 4: substitute d into the formula, then we can solve its circumference.

6 0
1 year ago
Someone please help me?
Harman [31]
The answer is 23 because I know this answer.
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3 years ago
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yuradex [85]

(0.4n)(16n) = (0.4)(16)(n)(n) = 6.4n²

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