If a1, a2, a3, 5, 4, a6, a7, a8, a9 are in H.P and D= | a1 a2 a3 |
| 5 4 a6 |
| a7 a8 a9 |
Then find the value of 21D .
[.] = greatest integer function

Answer is 50

wt d hell !!!!!! where are the steps
 

Hhh

a1,a2...a9 are H.P. Their reciprocal will be A.P. 1/a1,1/a2...1/a9.Then we will take common difference between 1/4-1/5.The answer will be common difference and then will get all terms which we will pit in matrice and will get determinant.Multiplying it by 21 we will het answer

Wher is the ans?