Use the Definition to find an expression for the area under the graph of f as a limit. Do not evaluate the limit. 2x f( x ) = - x2 + 8' lim 7 - 00 1 = 1 Need Help? Read It Watch It 8. [-/1 Points] DETAILS SCALCET8 5.1.022. Use the Definition to find an expression for the area under the graph of f as a limit. Do not evaluate the limit. f ( x ) = x2 + V1 + 2x,. 5 5x57 lim n - 00 Need Help? Read It 9. [-/1 Points] DETAILS SCALCET8 5.1.026. (a) Use the definition to find an expression for the area under the curve y = x from 0 to 1 as a limit. lim n - 0 i = 1 (b) The following formula for the sum of the cubes of the first n integers is proved in Appendix E. Use it to evaluate the limit in part (a) 13 + 23 + 33 + ... + 13 =. [n(n + 1) 12