Question

solve this question best ans will be marked brainliest​

Answer 1

The _____ temperature at which a substance catches fire is called it's ______ temperature

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Answer 2

Answer:

p³ + r³ - 8q³ = -6pqr

Step-by-step explanation:

Given : p, q and r in AP .

So,

=> q - p = r - q

=> 2q = p + r

On Cubing both sides , we get

⇒ (2q)³ = (p + r)³

=> 8q³ = p³  + r³  + 3pr(p + r)

As we know, p + r = 2q

=>  8q³ = p³  + r³  + 3pr(2q)

=> 8q³ = p³  + r³  + 6pqr

=> p³  + r³ - 8q³ = -6pqr

Therefore,

p³ + r³ - 8q³ = -6pqr

Hope it helps!