Calculus 1: Show work.

3. Let f(x) =5x 2 on the closed interval [-1, 3]

a. Draw a sketch of f(x) on [-1,3]

b. Subdivide [-1,3] into 4 subintervals. = ______

c. Calculate the Riemann sum R for f(x) with these subintervals and the left-hand endpoint used for the height of each subrectangle. Do not simplify your answer. R= _____________________________________________________________________________________________________ 4. If () 6 1 = 3, then () 1 6 = ____________________________ Explain:

5. If () 6 1 = 3, then 4() 6 1 =______________________________ Explain:

6. If () 6 1 = 3 () 8 6 = -1, then () 8 1 = ______________ Explain: