Hey i need w an ap calc ab question asap

Explanation:

So the limit of the sum of that function was equal to 21/2 (work attached).

Now after solving the other integrals, we get the first is equal to 8 after solving, the second is equal to 39/2, the third is equal to 25/2, and the last one is equal to 21/2 (our answer). So is our answer.

The answer is option 4.

Explanation: It comes from simple observation. We get from the expression that

, then in the expression given.

From that we get how much is, i.e.,    b-a = 3, and also

,

which shows us that the function is         and the initial value a=2,

the only option from the possibilities that fulfills all of it is the option number 4, that is