Which expressions are equal to 50Σn(n+6)?

S(n)=(25/3)n(n+1)(2n+19)

Step-by-step explanation:

sum_(n=1)^k n (6 + n) = 1/6 k (k + 1) (2 k + 19)

This is the equation in general:

substitute n for sum from 1 to n

For sum from k to n, substitute:

S(n)-S(k-1)

step-by-step explanation:

you divide the denominator by the numerator on both sides and if the quotients are equal then the fractions are equivalent

the workers who do no drive has no reasonable reason to buy gasoline due to they don't have anything to use it for