find the 25 th term of an arithmetic progression whose first term is 5 and the common difference is 7 .
n th term of a . p = a + ( n - 1 ) * d = 5 + ( 25 - 1 ) * 7 , = 5 + 168 = 173 . answer : c
add(multiply(subtract(25, const_1), 7), 5)