Questions
If the roots of the equation then their common difference will be
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a
±1
b
±2
c
±3
d
±4
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Correct option is C
Since, the given equation is cubic, therefore we take three roots.Let the roots be a−d,a,a+d Sum of three numbers in AP = 3a = 12⇒ a=4 is a root. .'. The given equation x3−12x2+39x−28=0 can be re written as (x−4)x2−8x+7=0∴ x=1,4,7 or 7,4,1∴ d=±3Similar Questions
If and 1 are in A.P, then x is equal to
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