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Notes of Chapter 02: Calculus with Analytic Geometry by Ilmi Kitab Khana, Lahore.
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Exercise 2.3: Page 1 of 17 - Avaiilable at www.mathcity.org
Notes of Chapter 02: Calculus with Analytic Geometry by Ilmi Kitab Khana, Lahore.
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EXERCISE2.3
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Find‘Ay, dy, A)’ "dy if l
1.0) y =x“-1, x=1"~.% ~==-0-5
(u) Y = ===2. Ax=0-3'
301. ~ y = I3’
1) Here L(-0-5)
<55 = 3(\)
. A‘) = §(a+n)—S(-1)
,[(1+n)3-1] -[Q-J = 30“)
: (ii-Q-51),-4 -1‘+\ 2 ‘J8
3 Now
(‘+b‘) "3
= (\-<>.s)1-(U3 A\5""‘J * '°‘“5 ’("‘"'§)
(°.s)3_‘ 2 -O"-‘K
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1'. 15-I
bu : -O-$75 -._
g 1;.-_-_~ ». ~_ .
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.. :: -3
(ii) y = ~11-3x-2 7 ‘-7-)5)‘ O
S&‘_ Q.‘
.-~*s-F5-1
A3 1 §(1+M.3-§-(M ‘I’ PM G)
‘,5 , _~,/__.=,.,.-1*
1571
~ = -“"I'**
\ 1 $31.1.
= ';(-its)-1 "Si" Q = _.'>_.__.<<»-3»
1
-Z -= _--—-"""
A3 .. O-'l\3§ Ag : O-Ilse
MUM?
z>~;_A~, = @-'z.\s§» 0-119°
g ~"""' 9w-5
Exercise 2.3: Page 2 of 17 - Avaiilable at www.mathcity.org
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Notes of Chapter 02: Calculus with Analytic Geometry by Ilmi Kitab Khana, Lahore.
32.
2. Use di“f'erentials to -approxiamte
(i) V262 4'
Sol. We consider
y = rm = ~/I __~.......--__~.__~~__<1;
with x = 25 and Ax = 1.2
From (1), we have
- d = 1
“-* dx
_y 2~E ‘ - ' _____ A (2,
* -
Substituting x = 25, (1.; = Ax = 1.2 in (2), we get
A) -1 _.L—-.(\.7.)
25? _g ., O-\'L
.3.-(\-1)
1‘!-5 : ‘O-VI.-\~§
_ \-2.
—-":‘
= 0-\‘L
"‘°‘~‘ A3 ch A5 = f(1+z>1)-§(>\,)
A3 = -5-
V
on = $33 -XI;
0.\7_ -= ‘ll.-7. -5
(ii) V80.9
301- Let J’ = /'(r) = \/E Now A51: A~3=§(1+m)-§l_~1)
H-u1‘A=Q\ and Ax: -—O.1=zlx
A3 LA‘ A =§H -
5 1+A1 F'
2;? -0-005$! = JQ\..¢.\ - ET
I- —-——_ (L-o.\)
zri-‘ —o-ooS§§ =‘Qh-Q -q
.. -0-‘
= 2*‘ S30-W _-Q : -0-4>0§§$'
-6-\
W £30-'\ =, -0-0\'§S§+q
Exercise 2.3: Page 3 of 17 - Avaiilable at www.mathcity.org
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Notes of Chapter 02: Calculus with Analytic Geometry by Ilmi Kitab Khana, Lahore.
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(iii) “*1 123
Sol. ‘I; ‘*3 = - %;
‘I -0-O1‘-L
WM 15; 9 (V2.3) ‘
Lu 5=§(-n = {'3 -~~ A;-'.- A3: §(1-vmn-*§(~n
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l-u;.\\ ~.\-¢\1-S J3 = ('a+m\)‘- x3
\ \ ‘I ‘I3
9'3"" A3 -: ‘$1.3- A‘ -o-oz“ -_-_ (I152-Z)’-(\1$)
1 Q '1 ‘I
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Ixtu = cos; Nan
- A‘) 14'-'o.'>((5+\. -C09‘.
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Ho 3 _'§_-L : QM -'-L
Q :- 1~ ‘K '= L ‘ 3‘. 1
Q» A1 2 \ xu us»
(1-1 1 (1-\ 3
NM A3 ., _$~‘~.a ‘
=-%A(r1;\.-1%“ -o~\Sn. - QM“-¢-§
‘K G,Q\._t>~S -; -O-\§\L
.;,=- \B0 q (Z,,g\' = -O-\S\1+o~$
= o-‘\3‘1$
l 1%,.---1
Exercise 2.3: Page 4 of 17 - Avaiilable at www.mathcity.org
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