29.01.2013 Views

Problems in Mathematical Analysis.pdf - pwp.net.ipl.pt

Problems in Mathematical Analysis.pdf - pwp.net.ipl.pt

Problems in Mathematical Analysis.pdf - pwp.net.ipl.pt

SHOW MORE
SHOW LESS

Create successful ePaper yourself

Turn your PDF publications into a flip-book with our unique Google optimized e-Paper software.

68 Differentiation of Functions [Ch.<br />

A. Higher-Order Derivatives of Explicit Functions<br />

In the examples that follow, f<strong>in</strong>d the second derivative of th<<br />

given function.<br />

667. y = x* + 7x' 5x + 4. 671. 668. y<br />

= // = e* 2<br />

. 672.<br />

669. y=sm*x. 673. y= (arc s<strong>in</strong> x) 2<br />

.<br />

670. y = \n t/\+x 2<br />

. 674. = */ acosh .<br />

j v u<br />

675. Show that the function y= 2<br />

ential equation<br />

676. Show that the function y = -^-x<br />

V^ I<br />

O<br />

Y -\<br />

2<br />

e x<br />

tial equation y" 2y'+y = e x .<br />

677. Show that the function y=-C l e" x + C 2 e' 2x<br />

a<br />

satisfies the differ<br />

satisfies the differen<br />

satisfies th<br />

equation y" 4-3y' -|-2y = for all constants C and C .<br />

l 2<br />

678. Show that the function y = e 2x s'm5x satisfies the equa<br />

f<br />

tion y" 4y +29y = 0.<br />

679. F<strong>in</strong>d y"' if , y = x s<br />

5x 2<br />

+ 7x 2.<br />

680. F<strong>in</strong>d /'"(3) f if /(*) - (2^: 3) 5<br />

.<br />

681. F<strong>in</strong>d y v of the function # = ln(l+x).<br />

682. F<strong>in</strong>d VI<br />

t/ of the function y==s<strong>in</strong>2x.<br />

683. Show that the function y = e~ x cosx satisfies the differ<br />

ential equation y lv + 4y = Q.<br />

684. F<strong>in</strong>d /(O), f (0), T(0) and /'"(O;<br />

if f(x) = e x s<strong>in</strong>x.<br />

685. The equation of motion of a po<strong>in</strong><br />

along<br />

the jc-axis is<br />

X-100-H5/ O.OOU 8<br />

F<strong>in</strong>d the velocity and the acceleration c<br />

the po<strong>in</strong>t for times / = 0, t =\ y an<br />

l<br />

f =10.<br />

t<br />

686. A po<strong>in</strong>t M is <strong>in</strong> motion around<br />

circle x 2<br />

+y 2 = a 2 with constant anguls<br />

Fig- 18<br />

velocity CD. F<strong>in</strong>d the law of motion of i1<br />

projection M, on the x-axis if at time / =<br />

the po<strong>in</strong>t is at M Q (a, 0) (Fig. 18). F<strong>in</strong>d the velocity and the ac<br />

celeration of motion of M,.<br />

What is the velocity and the acceleration of M at the <strong>in</strong><br />

l<br />

tial time and when it passes through the orig<strong>in</strong>?<br />

What are the maximum values of the absolute velocity and th<br />

absolute acceleration of Ai,?<br />

.

Hooray! Your file is uploaded and ready to be published.

Saved successfully!

Ooh no, something went wrong!