Drag each number to the correct location on the statements. Not all numbers will be used. Consider the sequence below.

Complete the recursively defined function to describe this sequence.

13
-13
-34
34
15
-21
f(1)=
f(n)=f(n-1)= for n= 2,3,4

the figure is a concave pentagon.

step-by-step explanation:

in mathematical context, a pentagon is a flat, two-dimensional closed shape (polygon) with 5 straight sides and 5 angles.

now a pentagon is said to be concave if one or more corners bend inwards and at least one of its angles is 180 degrees or more than 180 degrees.

in the given figure, we can see that we have a corner which is bending inwards and an angle which is clearly greater than 180°. therefore, it is a concave pentagon.

x+4 would be the answer