What is dx ? +2 O In | x3 + 21 + 0 3 O - In | x2| + c 3 O 3 In | x3 + 21 + C O 3 In | x2| + c O No correct option was presented here for this item.Applying the substitution method only once to get the antiderivative of 2x2. tan ( 4x3) by letting the variable u be an appropriate expression in terms of x, what is du in terms of dx? O 12x2 dx O 3x2 dx O 12 sec2(4x3) dx O 4x dx We will not be able to find a du that is expressible in terms of dx since substitution will not work here.\f(Use DESMOS or any online graphing application here.) Consider the closed region bounded by the graphs of y =2x2 - 7x+ 7, y=0.875 and the y-axis. If one wishes to find the volume of the solid that is generated by revolving such region about the x-axis using the SHELL METHOD, what is p in terms of y? O y - 0.875 Oy O y + 0.875 O 0.875y No correct option was presented here for this item.