Asked by Nina
If x + 7y = 29 is an equation of the line normal to the graph of f at the point (1,4), then f'(1) =
PLEASEEE HELP!
PLEASEEE HELP!
Answers
Answered by
Reiny
the slope of If x + 7y = 29 is -1/7
but this line is a normal, and therefore perpendicular to the tangent at (1.4)
so f'(1) or the slope of the tangent must be +7
but this line is a normal, and therefore perpendicular to the tangent at (1.4)
so f'(1) or the slope of the tangent must be +7
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