Question

Hello!) this is math :( can you help me please?

Answer 1

As in the first four terms, I assume that means using the equation with 1,2,3,4.

11) if n = 1, the answer would be 3.

If n = 2, the answer would be 10.

If n = 3, the answer would be 17.

If n = 4, the answer would be 24.

12) If n = 1, the answer would be 55.

If n = 2, the answer would be 45.

If n = 3, the answer would be 35.

If n = 4, the answer would be 25.

Answer 2

An explicit formula is used to find any term in a sequence by putting in the number of that term in place of the unknown variable.

In order to find the first four terms, we need to plug values, from 1-4, separately in each of the formulas.

For f(n) = 7(n+1) - 11, put values from 1-4 in place of n:

f(1) = 7(1+1) - 11 = 3 ----> First term

f(2) = 7(2+1) - 11 = 10 ----> Second term

f(3) = 7(3+1) - 11 = 17 ----> Third term

f(4) = 7(4+1) - 11 = 24 ----> Fourth term

For f(n) = 65 - 10n, put values from 1-4 in place of n:

f(1) = 65 - 10(1) = 55 ----> First term

f(2) = 65 - 10(2) = 45 ----> Second term

f(3) = 65 - 10(3) = 35 ----> Third term

f(4) = 65 - 10(4) = 25 ----> Fourth term