Question

u
18.
82
(D)
The products of three consecutive odd numbers is 357 627. What is their sum?
(A) 213
(B)243
(C)153
(D) 209
(AMTI 2005​

Answer 1

Answer:

=X(x-2)(x+2)=357 627

=X(x^2-4)=357 627

=x^3-4x=357 627

=x^3-4x-357 627=0

solving with this cubic equation we get X=71

so the numbers are

X-2=69

X=71

X+2=73

Therefore the sum is 213

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