Please solve the following question like the example provided below it. Math 400 (Calculus 1).

"Find the approximate or exact value of a definite integral using rectangles and/or the exact value of a definite integral using the Reimann Sum Definition." Use the definition of the definite integral (page 378) to find the exact value of the definite integral (x2 + 3)dx.Use the definition of the definite integral (page 378) to find the exact value of the definite integral f (2x2 - 3x - 1)dx. * AX= 1 -(-1) = 2 # Xi = -1+ 2 1 * f(xi) = 2( -1+ 3 ,i ) "- 3 (-1+3 -c )-1 = 2(1 -7ity =2 -81+8, 12 +3 - 6 1- 1 14 2 + 4 * f (xi )AX = 12 23 - 14 :+ 4 ) ( 3 h ) 16 :2_ 28 nact of * him I f(xi ) AX = him M: = lim 16 n ( nt )(2n+) _ 28. nunti), zon n 6 = lim 2n +3at/ 4-14 . nt! + B n 2 = lim + B 3 . 2 -14 +8 3 =