The sum of an integer and the next greater integer is at most 15. write an inequality to find the lesser integer. then solve for the lesser integer. help please please!!

To find the inverse of a number a, one can use the equation f(c) = a-1/c=0 where c is the inverse of a use the secant method of finding roots of equations to find the inverse of a = 2.5 ,er = 0.001%