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bixtya [17]
2 years ago
5

PLZ HELP ANSWER THIS QUESTION

Mathematics
1 answer:
mihalych1998 [28]2 years ago
7 0

Answer:

D

Step-by-step explanation:

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Which one of these formulas describes the following sequence?<br><br> 1,5,12,22,35
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We can find a formula for nth term of the given sequence as follows:

1, 5, 12, 22, 35

The 1st differences between terms:

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The 2nd differences :

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Since it takes two rounds of differences to arrive at a constant difference between terms, the nth term will be a 2nd degree polynomial of the form: a n^2 + b n + c, where c is a constant. The coefficients a, b, and the constant c can be found.

We can form the following 3 equations with 3 unknowns a, b, c:

1 = a\cdot1^2 + b\cdot1 + c\\5 = \cdot2^2 + b\cdot2 + c\\12 = a\cdot3^2 + b\cdot3 + c

Solving for a, b, c, we get:

a = 3/2, b = -1/2, c = 0

Therefore, the nth term of the given sequence is:

\boxed{ a_n = \dfrac{3}{2}n^2- \dfrac{1}{2} n}

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3 years ago
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Free_Kalibri [48]

Answer:

1.equilateral

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2 years ago
How can you find the slope of the line that passes through the points (0,0) and (2,4)
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Step-by-step explanation:

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3 years ago
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ExtremeBDS [4]

Answer:

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Step-by-step explanation:

-⅓m《-3

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