Question

What is the 45th term of the arithmetic sequence 16, 20, 24, 28, ..

Answer 1

Well, each new term is 4 more than the last one, so start adding.

Or you can do this:

\[a_n = a_1 + (n – 1)d\]

Where a_1 is the first term in the sequence, d is the number they are increasing by, and n is the term number you want:

\[a_{45} = 16 + (45 – 1)4 = 16+44*4 = 176+16=192\]

Answer 2

So the 45th term is 192

Answer 3

Thanks..

Answer 4

No prob, mind marking best response?

Answer 5

got cha!