4) A sequence is defined recursively by f(1) = 2
and f(n) = 3f(n-1) + 1. Find the first three
terms of the sequence.

- How do I do this question and just Recursive Sequences in general?

.

Let me explain why.

this is our first term.

second term.

third term.

...

Pretty simple huh?

Hope this helps.

The first 3 terms are 2, 7, 22.

Step-by-step explanation:

The n is the sequence number of the term: f(1) means the first term.

The second term

f(2) = 3f(n - 1) + 1   We make n  = 2:

=  3f(2-1) + 1

=  3f(1) + 1        f(1) = 2 so:

=  3*2 + 1

=  7.

3rd term f(3)

= 3f(3 - 1) + 1

= 3f(2) + 1

=  3(7) + 1

= 22.

the answer is b.

step-by-step explanation:

by the trigonometric ratio tangent, tangent equals opposite divided by adjacent.

therefore, tan(50) equals ac/3

multiply each side by 3 to get: ac=3tan(50)

the answer is b.

14

step-by-step explanation:

14 x 3 = 42