find out the c . i on rs . 4000 at 4 % p . a . compound half - yearly for 1 1 / 2 years
"a = 4000 ( 51 / 50 ) 3 = 4244.832 4000 - - - - - - - - - - - 244.83 answer : a"
subtract(multiply(4000, power(add(1, divide(4, const_100)), divide(const_3, 2))), 4000)