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5. If f(t)=3t3−2t2, find f′(2) 6. If f(x)=x5/2, what is f′′(4) ? 7. Find the slope of the graph of y=(4−x)5, at x=5 8. Compute dzd​(z3−4z2+z−3) and evaluate at z=−2 9. What is the slope of the curve y=(3x−5)1​ at x=1 ? Write the equation of the line tangent to this curve at x=1