Question

徐 詩晴

微積分65求k

XV
Finding a Value In Exercises 65-68, find k such that the
line is tangent to the graph of the function.
Function
Line
65. f(x) = k - x² or moimy y = − 6x + 1

微積分

Answer 1

呵

y=-6x+1斜率為-6 又f'(x)=- 2x
切點x=3 => y=-18+1=k-9 所以k=-8