what is the sum of the integers from - 150 to 155 , inclusive ?
"in an arithmetic progression , the nth term is given by tn = a + ( n - 1 ) d here tn = 155 , a = - 150 , d = 1 hence , 155 = - 150 + ( n - 1 ) or n = 306 sum of n terms can be calculated by sn = n / 2 ( a + l ) a = first term , l = last term , n = no . of terms sn = 306 * ( - 150 + 155 ) / 2 sn = 306 * 5 / 2 = 765 answer : d"
divide(multiply(150, 155), const_4)