Write a recursive rule and an explicit rule for the sequence 3,7,11,15
1 answer:
Answer:
The Recursive formula for the sequence is:
aₙ = aₙ₋₁ + d
The Explicit formula for the sequence is:
Step-by-step explanation:
Given the sequence
3,7,11,15
Here:
a₁ = 3
computing the differences of all the adjacent terms
7 - 3 = 4, 11 - 7 = 4, 15 - 11 = 4
The difference between all the adjacent terms is the same and equal to
d = 4
We know that a recursive formula basically defines each term of a sequence using the previous term(s).
The recursive formula of the Arithmetic sequence always involves the first term.
a₁ = 3
We know that, in the Arithmetic sequence, every next term can be obtained by adding the common difference and the preceding term.
so
The recursive formula of the sequence is:
aₙ = aₙ₋₁ + d
substitute n = 2 to find the 2nd term
a₂ = a₂₋₁ + d
a₂ = a₁+ d
substitute a₁ = 3 and d = 4
a₂ = 3 + 4
a₂ = 7
Thus, the recursive formula for the sequence 3,7,11,15 is:
aₙ = aₙ₋₁ + d
<u>An explicit rule for the sequence</u>
Given the sequence
3,7,11,15
We already know that
a₁ = 3
d = 4
An arithmetic sequence has a constant difference 'd' and is defined by
substituting a₁ = 3 and d = 4
Therefore, an explicit rule for the sequence
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Answer:
Step-by-step explanation:
Complex numbers:
The following relation is important for complex numbers:
Zeros of a function:
Given a polynomial f(x), this polynomial has roots such that it can be written as:
, in which a is the leading coefficient.
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If -i is a zero, its conjugate i is also a zero. So
Output of 40 when x=1
This means that when . We use this to find the leading coefficient a. So
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Answer:
- <u>300 cheese and 900 yogurt</u>
Explanation:
<u>1. Name the variables: </u>
<u />
- C = number of units of cheese
- Y = number of units of yogurt
<u>2. State the constraints (inequalities)</u>
a) Company can make 1,200 units of product each week:
- C + Y ≤ 1,200
b) Company must produce at least 300 units of cheese,
- C ≥ 300
c) Company must produce at least 450 units of yogurt.
- Y ≥ 450
<u />
<u>3. Build the graph</u>
a) C + Y ≤ 1,200
i) Draw the line C + Y = 1,200
- Use the y-intercept (0, 1200) and the x-intercept (1200,0)
- Use a solid line because thepoints on the line are part of the solution
ii) Shade the region below the line (again the line is inclueded)
b) C ≥ 300
i) Draw a solid vertical line that passes through (300,0)
ii) Shade the region to the right of the line (the line is included)
c) Y ≥ 450
i) Draw a solid horizontal line that passes through (450, 0)
ii) Shade the region above the line (the line is included)
The solution region is delimited by those three lines and it is shown on the graph attached.
<u>4. Determine the vertices of the triangle that forms the solution region</u>
a) Intersection of the lines C + Y = 1,200 and C = 300
- Y = 1,200 - 300 = 900
- Point (300, 900)
b) Intersection of the lines C + Y = 1200 and Y = 450
- C = 1,200 - 450 = 750
- Point (750, 450)
c) Intersection fo the lines C = 300 and Y = 450
- Point (350, 450)
<u />
<u>5. Determine the profits with the three vertices</u>
The profit equation is P = $60C + $90Y
a) Point (300, 900)
- P = $60(300) + $90(900) = $99,000
b) Point (750, 450)
- P = $60(750) + $90(450) = $85,500
c) Point (300, 450)
- P = $60(300) + $90(450) = $58,500
The maximum profit is when the company produces 300 units of cheese and 900 units of yogurt.
