Please help me with it, it's urgent! I want their solutions steps!

21. 22. 23. 1 Find the most general autiderivative of f [.12] = 2J5 + 6:205:12 Answer: 173" + Gain a: + G Let A be the area of the region that lies under the graph of f (1-) = 2x2 + 5 between I. = (l and .r = 4. Using right endpoints nd expressions for A as a limit. Evaluate the limit without using the Fundamental Theorem of Calculus. Answer: % Let A be the area of the regien that lies under the graph of f(.::] = 51:3 3;: between :1: = [l and :r = 3. Find an expressien fer the area A as a limit. Evaluate the limit without using the Fundamental Theorem of Calculus. Amwer: 3%]