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A sequence of numbers can be expressed by the function [tex]f(n) = 4n + 10[/tex], where the domain of the function is all positive integers. Which of the following statements is true?

A. [tex]f(-1) = 6[/tex]
B. [tex]f(0) = 40[/tex]
C. [tex]f(1) = 44[/tex]
D. [tex]f(10) = 50[/tex]

Answer :

To solve the problem of determining which statement is true regarding the function [tex]\( f(n) = 4n + 10 \)[/tex], we need to evaluate this function for specific values of [tex]\( n \)[/tex] mentioned in the options. Here's how we can do it step-by-step:

1. Understand the function:
The function given is [tex]\( f(n) = 4n + 10 \)[/tex]. This means for any integer value of [tex]\( n \)[/tex], you multiply it by 4 and then add 10 to get the value of the function.

2. Evaluate the function for the given options:

- Option A: [tex]\( f(-1) = 4(-1) + 10 = -4 + 10 = 6 \)[/tex]
- This matches the statement in option A, which states that [tex]\( f(-1) = 6 \)[/tex].

- Option B: [tex]\( f(0) = 4(0) + 10 = 0 + 10 = 10 \)[/tex]
- This value does not match the statement in option B, which claims [tex]\( f(0) = 40 \)[/tex].

- Option C: [tex]\( f(1) = 4(1) + 10 = 4 + 10 = 14 \)[/tex]
- This value does not match the statement in option C, which claims [tex]\( f(1) = 44 \)[/tex].

- Option D: [tex]\( f(10) = 4(10) + 10 = 40 + 10 = 50 \)[/tex]
- This matches the statement in option D, which states that [tex]\( f(10) = 50 \)[/tex].

3. Conclusion:
After evaluating the function for these specific values, we find that the true statements are Option A: [tex]\( f(-1) = 6 \)[/tex] and Option D: [tex]\( f(10) = 50 \)[/tex].

Therefore, both Options A and D are correct.

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