recursive function to display the sum of series

Write a recursive function called Rev takes a string argument (str) and and integerargument(i – the initial string position). Rev prints the str in reverse. You may not useany built-in reverse function or method. You may use string’s length method.

Write a recursive function to see if the first letter matches the last letter, return the middle letters and check until only 0 or 1 letters are left. It returns True or False. Here is the original code that needs to be checked: # Returns the first character of the string str def firstCharacter(str):     return str[:1] # Returns the last character of a string str def lastCharacter(str):     return str[-1:] # Returns the string that results from removing the first #  and last characters from str def middleCharacters(str):     return str[1:-1] def isPalindrome(str):     # base case #1     # base case #2     # recursive case     pass   Python code

The 4th problem mimics the situation where eagles flying in the sky can be spotted and counted.FindEagles: a recursive function that examines and counts the number of objects (eagles) in aphotograph. The data is in a two-dimensional grid of cells, each of which may be empty (value 0) orfilled (value 1 to 9). Maximum grid size is 50 x 50. The filled cells that are connected form an object(eagle). Two cells are connected if they are vertically, horizontally, or diagonally adjacent. Thefollowing figure shows 3 x 4 grids with 3 eagles. 0 0 1 21 0 0 01 0 3 1 FindEagle function takes as parameters the 2-D array and the x-y coordinates of a cell that is a part ofan eagle (non-zero value) and erases (change to 0) the image of an eagle. The function FindEagleshould return an integer value that counts how many cells has been counted as part of an eagle and havebeen erased. The following sample data has two pictures, the first one is 3 x 4, and the second one is 5 x 5 grids. Notethat your program…

Please solve this in C programming language as early as possible. .Write a recursive function that can use to add all the numbers from 5 to n, where n>5. n will be given by the user. Prototype: int add_num(int n);

2. Consider the following function: def func1(n): output = 1 for i in range (1, n) : output = i return output Rewrite the function as a recursive function.

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Write a recursive function to sort an array of integers into ascending order using the following idea: the function must place the smallest element in the first position, then sort the rest of the array by a recursive call. This is a recursive version of the selection sort. (Note: You will probably want to call an auxiliary function that finds the index of the smallest item in the array. Make sure that the sorting function itself is recursive. Any auxiliary function that you use may be either recursive or iterative.) Embed your sort function in a driver program to test it. Turn in the entire program and the output.

Write a recursive function that, given a sequence of comparable values, returns the count of elements where the current element is less than the following ( next ) element in the given sequence. See the examples given below.   def count_ordered ( seq ) :         """        Input : A sequence of comparable elements        Output : The number of elements that are less than the following element in the sequence        Example :        >>> count_ordered ( [ 1 , 2 , 3 , 4 , 5 , 6 ] )        5        >>> count_ordered ( ( 1 , 12, 7.3 , -2,4 ) )        2        >>> count_ordered ( 'Python' )        2        >>> count_ordered ( [ 6 ] )        0        >>> count_ordered ( [ ] )        0         """          In the first example above , count_ordered ( [ 1,2,3,4,5,6 ] )the returned answer is 5 because for all the first 5 numbers the current number is less than the next number. In the second example above, count_ordered ( ( 1,12,7.3 , -2,4 ) )the…

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