Chapter 24
Technical Mathematics with Calculus · 65 exercises
Problem 1
Make a complete graph of each function. Locate all features of interest. $$y=4 x^{2}-5$$
7 step solution
Problem 1
write the equations of the tangent and normal at the given point. Check some by calculator. $$y=x^{2}+2 \quad \text { at } x=1$$
6 step solution
Problem 1
Use the derivative to say whether each function is increasing or decreasing at the value indicated. Check by graphing. $$y=3 x^{2}-4 \text { at } x=2$$
4 step solution
Problem 2
Make a complete graph of each function. Locate all features of interest. $$y=3 x-2 x^{2}$$
8 step solution
Problem 2
write the equations of the tangent and normal at the given point. Check some by calculator. $$y=x^{3}-3 x \quad \text { at }(2,2)$$
5 step solution
Problem 3
Make a complete graph of each function. Locate all features of interest. $$y=5-\frac{1}{x}$$
4 step solution
Problem 3
write the equations of the tangent and normal at the given point. Check some by calculator. $$y=3 x^{2}-1 \quad \text { at } x=2$$
6 step solution
Problem 3
Use the derivative to say whether each function is increasing or decreasing at the value indicated. Check by graphing. $$y=4 x^{2}-x \text { at } x=-2$$
4 step solution
Problem 4
Make a complete graph of each function. Locate all features of interest. $$y=\frac{3}{x}+x^{2}$$
6 step solution
Problem 4
write the equations of the tangent and normal at the given point. Check some by calculator. $$y=x^{2}-4 x+5 \text { at }(1,2)$$
6 step solution
Problem 4
Use the derivative to say whether each function is increasing or decreasing at the value indicated. Check by graphing. $$y=x^{3}+2 x-4 \text { at } x=-1$$
4 step solution
Problem 5
Make a complete graph of each function. Locate all features of interest. $$y=x^{4}-8 x^{2}$$
7 step solution
Problem 5
write the equations of the tangent and normal at the given point. Check some by calculator. $$x^{2}+y^{2}=25 \quad \text { at }(3,4)$$
8 step solution
Problem 6
Make a complete graph of each function. Locate all features of interest. $$y=\frac{1}{x^{2}-1}$$
5 step solution
Problem 6
Use the derivative to say whether each function is increasing or decreasing at the value indicated. Check by graphing. $$y=x^{3}-4 x \text { at } x=2$$
4 step solution
Problem 7
Make a complete graph of each function. Locate all features of interest. $$y=x^{3}-9 x^{2}+24 x-7$$
6 step solution
Problem 7
Find the first quadrant point on the curve \(y=x^{3}-3 x^{2}\) at which the slope \(=9\).
4 step solution
Problem 7
Use the derivative to say whether each function is increasing or decreasing at the value indicated. Check by graphing. $$y=x^{3}+x^{2} \text { at } x=-2$$
4 step solution
Problem 8
Make a complete graph of each function. Locate all features of interest. $$y=x \sqrt{1-x}$$
8 step solution
Problem 8
Use the derivative to say whether each function is increasing or decreasing at the value indicated. Check by graphing. $$y=x^{4}+x-3 \text { at } x=0$$
4 step solution
Problem 9
Make a complete graph of each function. Locate all features of interest. $$y=5 x-x^{5}$$
7 step solution
Problem 9
Use the derivative to find the values of \(x\) for which each function is increasing, and for which it is decreasing. Check by graphing. $$y=3 x+5$$
3 step solution
Problem 10
Make a complete graph of each function. Locate all features of interest. $$y=\frac{9}{x^{2}+9}$$
8 step solution
Problem 10
Use the derivative to find the values of \(x\) for which each function is increasing, and for which it is decreasing. Check by graphing. $$y=4 x^{2}+16 x-7$$
4 step solution
Problem 11
Make a complete graph of each function. Locate all features of interest. $$y=\frac{6 x}{3+x^{2}}$$
6 step solution
Problem 11
Find the angle(s) of intersection, to nearest tenth of a degree, between the given curves. $$y=2-x \text { and } y=x^{2} \quad \text { at }(1,1)$$
5 step solution
Problem 12
Find the angle(s) of intersection, to nearest tenth of a degree, between the given curves. $$y=2 x \text { and } y=2-x^{2} \quad \text { at }(0.732,1.46)$$
6 step solution
Problem 12
Use the derivative to find the values of \(x\) for which each function is increasing, and for which it is decreasing. Check by graphing. $$y=2 x^{3}+4 x$$
4 step solution
Problem 13
Make a complete graph of each function. Locate all features of interest. $$y=x^{3}-6 x^{2}+9 x+3$$
10 step solution
Problem 13
Find the angle(s) of intersection, to nearest tenth of a degree, between the given curves. $$y=x^{2}+x-2 \text { and } y=x^{2}-5 x+4 \text { at }(1,0)$$
4 step solution
Problem 14
Make a complete graph of each function. Locate all features of interest. $$y=x^{2} \sqrt{6-x^{2}}$$
8 step solution
Problem 14
Find the angle(s) of intersection, to nearest tenth of a degree, between the given curves. $$y=-2 x \text { and } y=x^{2}(1-x) \text { at }(0,0),(2,-4), \text { and }(-1,2)$$
4 step solution
Problem 15
Make a complete graph of each function. Locate all features of interest. $$y=\frac{96 x-288}{x^{2}+2 x+1}$$
8 step solution
Problem 15
Use the derivative to find the values of \(x\) for which each function is increasing, and for which it is decreasing. Check by graphing. $$y=5 x+x^{5}$$
5 step solution
Problem 16
Make a complete graph of each function. Locate all features of interest. $$y=\frac{\sqrt{x}}{x-1}$$
7 step solution
Problem 17
Make a complete graph of each function. Locate all features of interest. $$y=\frac{x}{\sqrt{x^{2}+1}}$$
9 step solution
Problem 17
Use the second derivative to state whether each curve is concave upward or concave downward at the given value of \(x .\) Check by graphing. $$y=x^{4}+x^{2} \text { at } x=2$$
4 step solution
Problem 18
Make a complete graph of each function. Locate all features of interest. $$y=\frac{x^{3}}{\left(1+x^{2}\right)^{2}}$$
6 step solution
Problem 18
Use the second derivative to state whether each curve is concave upward or concave downward at the given value of \(x .\) Check by graphing. $$y=4 x^{5}-5 x^{4} \text { at } x=1$$
4 step solution
Problem 19
Make a complete graph of each function. Locate all features of interest. $$y=x^{2}+2 x$$
7 step solution
Problem 19
Use the second derivative to state whether each curve is concave upward or concave downward at the given value of \(x .\) Check by graphing. $$y=-2 x^{3}-2 \sqrt{x+2} \text { at } x=\frac{1}{4}$$
4 step solution
Problem 20
Make a complete graph of each function. Locate all features of interest. $$y=x^{2}-3 x+2$$
7 step solution
Problem 20
Use the second derivative to state whether each curve is concave upward or concave downward at the given value of \(x .\) Check by graphing. $$y=\sqrt{x^{2}+3 x} \text { at } x=2$$
5 step solution
Problem 21
Make a complete graph of each function. Locate all features of interest. $$y=x^{3}+4 x^{2}-5$$
6 step solution
Problem 21
Use the second derivative to state whether each curve is concave upward or concave downward at the given value of \(x .\) Check by graphing. $$y=2 x+x^{2} \text { at } x=1$$
4 step solution
Problem 22
Make a complete graph of each function. Locate all features of interest. $$y=x^{4}-x^{2}$$
6 step solution
Problem 22
Use the second derivative to state whether each curve is concave upward or concave downward at the given value of \(x .\) Check by graphing. $$y=x^{3}-x \text { at } x=2$$
5 step solution
Problem 23
Graph the region bounded by the given curves. \(y=3 x^{2}\) and \(y=2 x\)
5 step solution
Problem 23
Use the second derivative to state whether each curve is concave upward or concave downward at the given value of \(x .\) Check by graphing. $$y=x+x^{3} \text { at } x=-1$$
4 step solution
Problem 24
Graph the region bounded by the given curves. \(y^{2}=4 x, x=5,\) and the \(x\) axis, in the first quadrant
4 step solution