Math

QuestionWhich function represents the sequence 3,7,11,15,19,23,3, 7, 11, 15, 19, 23, \ldots? A) f(x)=4x4f(x)=4x-4, B) f(x)=4x3f(x)=4x-3, C) f(x)=4x2f(x)=4x-2, D) f(x)=4x1f(x)=4x-1.

Studdy Solution

STEP 1

Assumptions1. The given sequence is an arithmetic sequence, which means the difference between consecutive terms is constant. . The sequence given is 3,7,11,15,19,23,3,7,11,15,19,23, \ldots
3. We have to find the function that describes this sequence.

STEP 2

First, we need to find the common difference of the arithmetic sequence. We can do this by subtracting the first term from the second term.
Commondifference=SecondtermFirsttermCommon\, difference = Second\, term - First\, term

STEP 3

Now, plug in the given values for the first term and second term to calculate the common difference.
Commondifference=73Common\, difference =7 -3

STEP 4

Calculate the common difference.
Commondifference=73=4Common\, difference =7 -3 =4

STEP 5

Now that we have the common difference, we can write the general form of an arithmetic sequence. The nth term of an arithmetic sequence can be given byan=a1+(n1)da_n = a1 + (n-1)dwhere ana_n is the nth term, a1a1 is the first term, nn is the term number, and dd is the common difference.

STEP 6

Plug in the values for the first term and the common difference into the general form.
an=3+(n1)4a_n =3 + (n-1)4

STEP 7

implify the equation.
an=3+4n4a_n =3 +4n -4

STEP 8

Further simplify the equation.
an=4n1a_n =4n -1This is the function that describes the given arithmetic sequence, which corresponds to option D.

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