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The pattern of numbers below is an arithmetic sequence:

14, 24, 34, 44, 54, ...

Which statement describes the recursive function used to generate the sequence?

A. The common difference is 1, so the function is [tex]f(n + 1) = f(n) + 1[/tex] where [tex]f(1) = 14[/tex].
B. The common difference is 4, so the function is [tex]f(n + 1) = f(n) + 4[/tex] where [tex]f(1) = 10[/tex].
C. The common difference is 10, so the function is [tex]f(n + 1) = f(n) + 10[/tex] where [tex]f(1) = 14[/tex].
D. The common difference is 14, so the function is [tex]f(n + 1) = f(n) + 14[/tex] where [tex]f(1) = 10[/tex].

Answer :

The sequence is an arithmetic sequence

The solution is Option C.

The common difference is 10, so the function is f(n + 1) = f(n) + 10

where f(1) = 14.

What is Arithmetic Progression?

An arithmetic progression is a sequence of numbers in which each term is derived from the preceding term by adding or subtracting a fixed number called the common difference "d"

The general form of an Arithmetic Progression is a, a + d, a + 2d, a + 3d and so on. Thus nth term of an AP series is Tn = a + (n - 1) d, where Tₙ = nth term and a = first term. Here d = common difference = Tₙ - Tₙ₋₁

Sum of first n terms of an AP: Sₙ = ( n/2 ) [ 2a + ( n- 1 ) d ]

Given data ,

Let the arithmetic sequence be A = 14, 24, 34, 44, 54 ..

Now , the common difference between these numbers is calculated by

Common difference d = second term - first term

Common difference d = 24 - 14

Common difference d = 10

Now , let the number of terms be = n

The first term of the arithmetic sequence is f ( 1 ) = 14

The second term of the arithmetic sequence is f ( 2 ) = f ( 1 ) + d

f ( 2 ) = 14 + 10

f ( 2 ) = 24

The third term of the arithmetic sequence is f ( 3 ) = f ( 2 ) + 10

f ( 3 ) = 24 + 10

f ( 3 ) = 34

The fourth term of the arithmetic sequence is f ( 4 ) = f ( 3 ) + 10

f ( 3 ) = 34 + 10

f ( 4 ) = 44

So , the arithmetic progression is given by the equation

f ( n + 1 ) = f ( n ) + 10

where f ( 1 ) = 14 and the common difference d is 10

Hence , The common difference is 10, so the function is f(n + 1) = f(n) + 10 where f(1) = 14.

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