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Simple maths question lower grade

0 votes

f(x) = 2x^3-8x^2+13x-10 / x^3-4x^2+5x-2 

apply long division to write the function in asymptotic form 

working out please

asked May 10, 2014 in TRIGONOMETRY by anonymous

1 Answer

0 votes

f (x ) = (2x 3 - 8x 2 + 13x - 10) / (x 3 - 4x 2 + 5x - 2)

x 3 - 4x 2 + 5x - 2 ) 2x 3 - 8x 2 + 13x - 10 (2

                                2x 3 - 8x 2 + 10x - 4

                            (-)      (+)      (-)      (+)

                       ______________________________

                                           3x - 6

Quotient is 2 and remainder is 3x - 6.

f (x ) = (2x3 - 8x 2 + 13x - 10) / (x 3 - 4x 2 + 5x - 2)

f (x) = (x - 2)(2x 2 - 4x + 5)/(x - 2)(x - 1) 2

f (x) = (2x 2 - 4x + 5)/(x - 1)2

Asympototic form is f (x ) = 2 + [(3x - 6)/(x 3 - 4x 2 + 5x - 2)].

or

f (x ) = 2 + [3/(x -1)2]

answered May 15, 2014 by david Expert

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