The first three terms of a sequence are given. Write an explicit formula for the terms.

17, 10, 3, ...

Find the 72nd term of [1], round to the nearest thousandth if necessary

The first three terms of a sequence are given. Write an explicit formula for the terms.

7, -21, 63, ...

Find the 13th term of [3] Round to the nearest thousandth if necessary

If a_1=10 and a_n=3a_{n-1} find the value of a_5

If a_1=3 and a_n=4(a_{n-1})-5 find the value of a_4

If a_1=4 and a_n=(a_{n-1})^2+n find the value of a_3

If a_n=10 and a_{n+1}=-3(a_n)+5 find the value of a_4

Write an explicit formula that represents the sequence defined by the following recrusive formula:

a_1=50 and a_n=\frac{1}{5}a_{n-1}