BAHAN UTS INTEGRAL
Untuk Integral Tak Tentu.
1.
Penyelesaian:
2.
Penyelesaian:
3.
Penyelesaian:
Untuk Integral Tertentu
4.
5.
Penyelesaian:
Penyelesaian:
.................................
Soal 125 Integral Tak Tentu dan Tentu
POSTED BY KALAKAY ⋅ 20 MARET 2010 ⋅ 31 KOMENTAR
FILED UNDER INTEGRAL, INTEGRAL TAK TENTU DAN TENTU, SOAL 125
79 Votes
Jawaban: c
................................
s & Matematika >
Matematika
Berikutnya
Integral dari sinx/(sinx + cosx) dx?
Ada yang bisa ga?? Dulu aku bisa.. tapi lupa caranya.. ga ada ide lagi..
Jawaban Terbaik Pilihan Penanya
Hemant Dijawab 4 tahun yang lalu
. . . . .I = ∫ [ ( sin x ) / ( sin x + cos x ) ] dx
= (1/2) ∙ ∫ [ ( 2 sin x ) / ( sin x + cos x ) ] dx
= (1/2) ∙ ∫ { [ ( sin x + cos x ) ( cos x sin x ) ] / ( sin x + cos x ) } dx ... Note This
= (1/2) ∙ { ∫ (1) dx ∫ [ ( cos x sin x ) / ( sin x + cos x ) ] dx }
= (1/2) ∙ { x ∫ ( 1/ u ) du }, ....... ...... u = sin x + cos x
= (1/2)∙ x (1/2)∙ ln | u | + C
= ( x/2 ) (1/2)∙ ln | sin x + cos x | + C ......... Ans.
________
...............................
Proof: Integral ln(x)
(Math | Calculus | Integrals | Table Of | ln x)
Discussion of
ln(x) dx = x ln(x) - x + C.
1. Proof
Strategy: Use Integration by Parts.
ln(x) dx
set
u = ln(x), dv = dx
then we find
du = (1/x) dx, v = x
substitute
ln(x) dx =
u dv
and use integration by parts
= uv -
v du
substitute u=ln(x), v=x, and du=(1/x)dx
= ln(x) x -
x (1/x) dx
= ln(x) x -
dx
= ln(x) x - x + C
= x ln(x) - x + C.
Q.E.D.
1.
Penyelesaian:
2.
Penyelesaian:
3.
Penyelesaian:
Untuk Integral Tertentu
4.
5.
Penyelesaian:
Penyelesaian:
.................................
Soal 125 Integral Tak Tentu dan Tentu
POSTED BY KALAKAY ⋅ 20 MARET 2010 ⋅ 31 KOMENTAR
FILED UNDER INTEGRAL, INTEGRAL TAK TENTU DAN TENTU, SOAL 125
79 Votes
Jawaban: c
................................
s & Matematika >
Matematika
Berikutnya
Integral dari sinx/(sinx + cosx) dx?
Ada yang bisa ga?? Dulu aku bisa.. tapi lupa caranya.. ga ada ide lagi..
Jawaban Terbaik Pilihan Penanya
Hemant Dijawab 4 tahun yang lalu
. . . . .I = ∫ [ ( sin x ) / ( sin x + cos x ) ] dx
= (1/2) ∙ ∫ [ ( 2 sin x ) / ( sin x + cos x ) ] dx
= (1/2) ∙ ∫ { [ ( sin x + cos x ) ( cos x sin x ) ] / ( sin x + cos x ) } dx ... Note This
= (1/2) ∙ { ∫ (1) dx ∫ [ ( cos x sin x ) / ( sin x + cos x ) ] dx }
= (1/2) ∙ { x ∫ ( 1/ u ) du }, ....... ...... u = sin x + cos x
= (1/2)∙ x (1/2)∙ ln | u | + C
= ( x/2 ) (1/2)∙ ln | sin x + cos x | + C ......... Ans.
________
...............................
Proof: Integral ln(x)
(Math | Calculus | Integrals | Table Of | ln x)
Discussion of
ln(x) dx = x ln(x) - x + C.
1. Proof
Strategy: Use Integration by Parts.
ln(x) dx
set
u = ln(x), dv = dx
then we find
du = (1/x) dx, v = x
substitute
ln(x) dx =
u dv
and use integration by parts
= uv -
v du
substitute u=ln(x), v=x, and du=(1/x)dx
= ln(x) x -
x (1/x) dx
= ln(x) x -
dx
= ln(x) x - x + C
= x ln(x) - x + C.
Q.E.D.