Question

please help standard 9th SSC board ratio and proportion​

Answer 1

Answer:

a+b+c

≥(abc)

1/3

⇒a+b+c≥3(abc)

1/3

⇒1,abc,a

2

b

2

c

2

in A.P. ∵abc



=0

2abc=1+a

2

b

2

c

2

⇒abc=1 so a+b+c≥3

Hence minimum values of a+b+c is 3.

Consider the numbers −2 and 8. Their A.M.=−5 and G.M.

=

(−2)(−8)

=4

∴A.M.<G.M.