Jawab:

1 .

a) The formula for the nth term in the sequence 3, 5, 7,... is given by 3 + 2(n - 1)

b) The formula for the nth term in the sequence 1, 1.5, 2,... is given by 1 + 0.5(n - 1)

c) The formula for the nth term in the sequence 20, 17, 14,... is given by 20 - 3(n - 1)

d) The formula for the nth term in the sequence 5√2, 4√2, 3√2,... is given by 5√2 - (n - 1)√2

2) .

a) To find the 25th term in the sequence 4, 10, 16,..., we can use the formula found in question 1a:

3 + 2(24) = 3 + 48 = 51

So the 25th term is 51.

b) To find the 40th term in the sequence 20√3, 18√3, 16√3,..., we can use the formula found in question 1d:

5√2 - (n - 1)√2 = 20√3 - (40 - 1)√3 = 20√3 - 39√3 = 20√3 - 39√3 = -19√3.