Math, asked by mohitvashisth40, 11 months ago

if a,b,c are in a.p prove that
(1) 8b^3-a^3-c^3=3ac(a+c)

rekharr1424: hey mohit y r u report it

Answers

Answered by rekharr1424

Step-by-step explanation:

It is given that a,b and c is in AP then,

a+c=2b

cubing both side

(a+c)³=(2b)³

a³+c³+3ac(a+c)=8b³

3ac(a+c)=8b³-a³-c³

I hope it helps u....

rekharr1424: hey didn't report it this time

mohitvashisth40: ok and for that sorry

rekharr1424: ok

rekharr1424: its ok

rekharr1424: u r in which class

mohitvashisth40: i am in college

rekharr1424: then y r u ask this question

rekharr1424: it is of 9th or 8th standard question

rekharr1424: tell me bro

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