I've been stuck on this problem for forever. How the fuck do you do this /sci/? "I the solutions to the equation: x^3 -9x^2 +ax=48 are in arithmetic progression, what is the value of a?" HOW??

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Anonymous Sun Jan 29 17:57:56 2012 No.4308122 [Reply] [Original]

I've been stuck on this problem for forever. How the fuck do you do this /sci/?

"I the solutions to the equation: x^3 -9x^2 +ax=48 are in arithmetic progression, what is the value of a?"

HOW??

>>	Anonymous Sun Jan 29 17:59:12 2012 No.4308129 What does it mean to say the solutions "are in arithmetic progression?"

>>	Anonymous Sun Jan 29 18:01:23 2012 No.4308133 >>4308129 I think it means that the difference between each of the solutions is the same.

>>	Anonymous Sun Jan 29 18:04:52 2012 No.4308152 Find the roots as a function of a. Find value of a that satisfies the arithmetic progression requirement.

>>	Anonymous Sun Jan 29 18:08:07 2012 No.4308168 x = 4.5 +/- sqrt [ ( 48 / x ) + 20.25 ] Pretty obvious from here

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/sci/ - Science & Math