calculate slope of tangent f(x) = sqrt2x+3  where x=2 use this method  show all steps and calculations

Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
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calculate slope of tangent f(x) = sqrt2x+3  where x=2

use this method 

show all steps and calculations

Ex. 2 Find the slope of the tangent to y=-x²+2x+6 for the point when x=5
@x= 5+h
y=(3+h)² + 2(5+h) +6
-25-10h-h² +10-2h+6
=-9-8h-h²
(5th, -9-8h-1²)
=lim X (-8-h), h+0
100
-8-h
Find 'y' coordinate
@ y = -(3) ² + 2(5) + 6
= -25+10+6
--9
: the point is (5,-9)
meon= Rim f(sth)-f(s)
5th-3
h+o
= fim - 9-8h-h² - (-a)
ho
3th-3
-8h-h²
- Rim
Ex 3. Determine the slope of the tangent to f(x)-
OP (3,4)
X = 3+h
f(31h)= 3+ha9
31h
= 12+h
3+h
.: the slope of
the tangent at
paint Pis -1, hvo
x=51h
f(son) (Sthis
= √9th
: the slope of
the tangent at 4-5
is thro
Mion"
2+9
at P(3,4)
X
nº fim +(3+h)-f(3)
3+h-3
12th -U
=-8, hvo
= Rum
ho
Ex 4. Find the slope of the tangent to f(x)=√x+4 atx=5
fls) = (344
= lim
2+0
lim
hao
= lim
em hinh
ma
h
(12th ~ - 4 (3+h) ) =
=h
3th
+
12th-12-4h.
3+h
h
- emm 9-1-9
nno
mtan= lim f(s+h)-f(3)
5th-5
Tain -3.
-3
31h
h(विक 13)
lor
htu k(rain 13)
2. the slope
of the tangent
when ys 513
-8, ho
ħ
9th +3
√4th 13
2-1, hvo
th₂o
Transcribed Image Text:Ex. 2 Find the slope of the tangent to y=-x²+2x+6 for the point when x=5 @x= 5+h y=(3+h)² + 2(5+h) +6 -25-10h-h² +10-2h+6 =-9-8h-h² (5th, -9-8h-1²) =lim X (-8-h), h+0 100 -8-h Find 'y' coordinate @ y = -(3) ² + 2(5) + 6 = -25+10+6 --9 : the point is (5,-9) meon= Rim f(sth)-f(s) 5th-3 h+o = fim - 9-8h-h² - (-a) ho 3th-3 -8h-h² - Rim Ex 3. Determine the slope of the tangent to f(x)- OP (3,4) X = 3+h f(31h)= 3+ha9 31h = 12+h 3+h .: the slope of the tangent at paint Pis -1, hvo x=51h f(son) (Sthis = √9th : the slope of the tangent at 4-5 is thro Mion" 2+9 at P(3,4) X nº fim +(3+h)-f(3) 3+h-3 12th -U =-8, hvo = Rum ho Ex 4. Find the slope of the tangent to f(x)=√x+4 atx=5 fls) = (344 = lim 2+0 lim hao = lim em hinh ma h (12th ~ - 4 (3+h) ) = =h 3th + 12th-12-4h. 3+h h - emm 9-1-9 nno mtan= lim f(s+h)-f(3) 5th-5 Tain -3. -3 31h h(विक 13) lor htu k(rain 13) 2. the slope of the tangent when ys 513 -8, ho ħ 9th +3 √4th 13 2-1, hvo th₂o
A TANGENT is the straight line that BEST approximates a curve locally at a given point.
The slope at that point is defined as the slope of the tangent to the curve at that point.
Two problems in Calculus:
1) Slope of the tangent to the curve
2) Area under the curve
Ay
Recall:
AX
More importantly, the slope is the rate of change of y with regards to x. m= y₂-y₁
Ex 1: Determine the slope of the tangent to y=x² at P(2,4).
Meront Pa
tangent
at P
m
Pla fall
(2th, f(zh))
; the
slope of the
tangent at
Point Pis
4th, hvo
f(2+h)-(2)
2th 2
= (2+h) ³-4
21h-2
= 4+4h+h²-4
h
= 4h+h²
h
= w[4+h)
Tangent line
The slope of the tangent to a curve at a point, P, is the limiting slope of the secant PQ as the point Q slides
along the curve to point P.
le: the slope of the tangent is the limit of the slope of the secant as Q approaches Palong the curve.
Ql+ha+h)
P
mpg = 4th
Mton - Rim (41h)
=4
= 4+h,
hvo
Slope of a Tangent as a Limit
The slope of the tangent to the graph y=f(x) at point P(a.f(a)) is
Fle+A)-(e), if this limit exists.
= A
lim²
A
means os 'n' gets closer
to 0, 4th approaches 4,
Transcribed Image Text:A TANGENT is the straight line that BEST approximates a curve locally at a given point. The slope at that point is defined as the slope of the tangent to the curve at that point. Two problems in Calculus: 1) Slope of the tangent to the curve 2) Area under the curve Ay Recall: AX More importantly, the slope is the rate of change of y with regards to x. m= y₂-y₁ Ex 1: Determine the slope of the tangent to y=x² at P(2,4). Meront Pa tangent at P m Pla fall (2th, f(zh)) ; the slope of the tangent at Point Pis 4th, hvo f(2+h)-(2) 2th 2 = (2+h) ³-4 21h-2 = 4+4h+h²-4 h = 4h+h² h = w[4+h) Tangent line The slope of the tangent to a curve at a point, P, is the limiting slope of the secant PQ as the point Q slides along the curve to point P. le: the slope of the tangent is the limit of the slope of the secant as Q approaches Palong the curve. Ql+ha+h) P mpg = 4th Mton - Rim (41h) =4 = 4+h, hvo Slope of a Tangent as a Limit The slope of the tangent to the graph y=f(x) at point P(a.f(a)) is Fle+A)-(e), if this limit exists. = A lim² A means os 'n' gets closer to 0, 4th approaches 4,
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