Take a squared paper and arrange 48 counters on it in different number of rows as shown below :

What do you observe ? As R increase, C derecases.
(i) Is `R_(1):R_(2)=C_(2):C_(1)` ? (ii) Is `R_(3):R_(4)=C_(4):C_(3)?`
(iIi) Are R and C inversely proportional to each other ?

Take a squared paper and arrange 48 counters on it in different number of rows as shown below . What do you observe ? As R increases C decreases . (i) Is R_(1): R_(2) : C_(2) : C_(1) ? (ii) Is R_(3) : R_(4) = C_(4) : C_(3) ? (iii) Are R and C inversely proportional to each other ?

Prove that r_(1) r_(2) + r_(2) r_(3) + r_(3) r_(1) = (1)/(4) (a + b + c)^(2)

If ""^(n)C_(r ): ""^(n)C_(r+1)=1:2 and ""^(n)C_(r+1): ""^(n)C_(r+2)=2:3 , find n and r.

In triangle ABC .If (r_(1)+ r _(2))(r _(2)+ r _(3)) (r_(3)+r_(1))=4Rs^(2) Then prove it

If .^(15)C_(3r)=.^(15)C_(r+3), find .^(r)C_(2) .

If \ ^(43)C_(r-6)=\ ^(43)C_(3r+1)\ then the value of r is

Show that r_(1)+r_(2)=c cot ((C)/(2))

if .^(2n)C_(2):^(n)C_(2)=9:2 and .^(n)C_(r)=10 , then r is equal to

The exradii r_1,r_2 and r_3 of /_\A B C are in H.P. Show that its sides a , b a n d c are in AdotPdot