Review Checkpoint 1 and the paragraph you just read. Then write a reason for each of the following statements.
`int_a^b ftext[(]t text[)] dt=Ftext[(]b text[)]`
`Ftext[(]b text[)]=Gtext[(]b text[)]+C`
`Ftext[(]b text[)]=Gtext[(]b text[)]-Gtext[(]a text[)]`
`int_a^bftext[(]t text[)] dt=Gtext[(]b text[)]-Gtext[(]a text[)]`