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The slopes of the tangents to the curve ...

The slopes of the tangents to the curve `y=(x+1)(x-3)` at the points where it cuts the x - axis, are `m_(1) and m_(2)`, then the value of `m_(1)+m_(2)` is equal to

A

8

B

`-2`

C

2

D

0

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The correct Answer is:
D
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