Question

hello doston

plss solve this its answer is (b) plss tell me how plss bhai or behen​

Answer 1

Answer:

(b ) - 6pqr

Step-by-step explanation:

Given-----> p , q , r are in AP .

To find ----> Value of p³ + r³ - 8q³

Solution------> ATQ,

p , q and r are in AP , so,

p + r = 2q

=> p + r - 2q = 0

=> p + r + ( -2q ) = 0

Now , we know that if,

a + b + c = 0 , then ,

a³ + b³ + c³ = 3abc

Now putting a = p , b = r , c = - 2q

p + r + ( -2q ) = 0 ( we proved it before )

So , p³ + r³ + ( - 2q )³ = 3 ( p ) ( r ) ( -2q )

=> p³ + r³ + ( - 8q³ ) = - 6pqr

=> p³ + r³ - 8q³ = - 6pqr

Answer 2

Answer:

Surbhi kha hai yarr Tu??????