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Question

Find the slope of the tangent to the curve , x ≠ 2 at x = 10.

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Solution

The given curve y is defined as,

y= x1 x2

The slope of the tangent for a curve y at a given point x= x 0 is given by,

slope= ( dy dx ) x= x 0

Substitute x1 x2 for y and 10 for x 0 .

( dy dx ) x=10 = ( ( x2 )( 1 )( x1 )( 1 ) ( x2 ) 2 ) x=10 = ( x2x+1 ( x2 ) 2 ) x=10 = ( 1 ( x2 ) 2 ) x=10 = 1 64

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