Sequence and Series 83 Difficulty Level: B
6
(a) If a is A. M. between b and c, b is G. M. between a and c, then
prove that c will be H. M. between a and b.
(b) If a, b, c be in A. P., b, c, a in H. P., then show that c, a, b are in
G. P.
(c) Show that bº is greater than, equal to or less than ac according as
a, b, c are in A. P., G. P. and H. P.
If b + c, c + a, a + b are in H. P. then show that a, b, c are in
A. P.
[CTEVT 2074]
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Prove that a, b, care in G. P. or in H. P. according as
a-ba
b-cb
>
a
or

answer: 0+0=0

step-by-step explanation:

that is the only answer that can make 0

step-by-step explanation:

there is a formula i can give you:

it is r^2*n*sin(360/n) divided by 2 where r represents the "radius" and n is the number of sides.

plug them in:

(10sqrt(3))^2*6*sin(360/6) divided by 2

100*3*6*sin(60) divided by 2

900*sin(60)

900*sqrt(3)/2

450*sqrt(3)

approx is 779.4 cm^2

answer: idk

step-by-step explanation:

step-by-step explanation:

divide, then simplify your answer.

1. make -15.66 ÷   5.8 a fraction. then divide.

2. simplify.  

3. final answer.