Answered

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Find the coordinates of the point on the curve y = 2x² - x - 1 at which the gradient is 7

Sagot :

Answer:

See below

Step-by-step explanation:

The derivative of the function is the slope

2x^2 - x -1       take derivative  ( f ' )

4x -1                 equate to 7

7 = 4x -1

x = 2        sub into the original equation to find y = 5

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