1
You visited us
1
times! Enjoying our articles?
Unlock Full Access!
Byju's Answer
Standard VIII
Mathematics
Common Difference
If a,b,c are ...
Question
If a,b,c are in AP prove that:4a,4b,4c are in AP and also prove that a+4,b+4,c+4 are in AP
Open in App
Solution
Dear student
Given
:
a
,
b
and
c
are
in
AP
⇒
2
b
=
a
+
c
.
.
.
1
To
prove
:
4
a
,
4
b
,
4
c
are
in
AP
ie
To
show
:
2
4
b
=
4
a
+
4
c
ie
To
show
:
8
b
=
4
a
+
4
c
Consider
,
4
a
+
4
c
=
4
a
+
c
=
4
2
b
using
1
=
8
b
Hence
proved
So
,
4
a
,
4
b
,
4
c
are
in
AP
Now
to
prove
:
a
+
4
,
b
+
4
,
c
+
4
are
in
AP
ie
To
show
:
2
b
+
4
=
a
+
4
+
c
+
4
Consider
,
a
+
4
+
c
+
4
=
a
+
c
+
8
=
2
b
+
8
using
1
=
2
(
b
+
4
)
Hence
proved
So
,
a
+
4
,
b
+
4
,
c
+
4
are
in
AP
.
Regards
Suggest Corrections
0
Similar questions
Q.
If
a
2
, b
2
, c
2
are in AP, prove that a/b+c , b/c+a , c/a+b are in AP
Q.
If a, b, c are in AP prove that
(
a
−
c
)
2
=
4
(
b
2
−
a
c
)
.
Q.
If
a
2
,
b
2
,
c
2
are in AP, prove that
a
b
+
c
,
b
c
+
a
,
c
a
+
b
are in AP.
Q.
If
a
,
b
,
c
are in AP and
b
,
c
,
d
are in GP and
1
c
,
1
d
,
1
e
are in AP, prove that
a
,
c
,
e
are in GP.
Q.
In any
Δ
A
B
C
, if
a
2
,
b
2
,
c
2
are in AP then prove that
c
o
t
A
,
c
o
t
B
,
c
o
t
C
, are in AP
View More
Join BYJU'S Learning Program
Grade/Exam
1st Grade
2nd Grade
3rd Grade
4th Grade
5th Grade
6th grade
7th grade
8th Grade
9th Grade
10th Grade
11th Grade
12th Grade
Submit
Related Videos
Introduction to AP
MATHEMATICS
Watch in App
Explore more
Common Difference
Standard VIII Mathematics
Join BYJU'S Learning Program
Grade/Exam
1st Grade
2nd Grade
3rd Grade
4th Grade
5th Grade
6th grade
7th grade
8th Grade
9th Grade
10th Grade
11th Grade
12th Grade
Submit
AI Tutor
Textbooks
Question Papers
Install app