Help me with this math plz

Consider the sequence below. 3 , 1 , 1/3 , 1/9 , select the explicit function which defines the sequence.

The function f(x)= x5+ ( x + 3)2 is used to create a table. if x = -1 then what is f(x)?

Jubal wrote the four equations below. he examined them, without solving them, to determine which equation has no solution. which of jubal’s equations has no solution hurry