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ANSWER: B
ok done. Thank to me :>
Set . Find the tangent line
to
at the point when
:
(slope of
)
Set , the root of
. The tangent line
to
at
has slope and thus equation
which has its root at .
(The actual value of this root is about -0.6777)
Given parameters:
1.
; find the LCM = 8
=
=
2.
Make the fraction decimal;
= -2.4
So;
-2.4 + 15.3 = 12.9