15) Thinkwell | 201 Test 2: Chapters 3 Derivatives and 4 Computations What is the slope of the tangent line of the function f(x) = 4x2 - 2x + 1 at x? -8x - 2 8x + 2 8x - 2 -8x + 2 16) What is the derivative of the function -12x - 6x - 6 f(20) =-6202 - 3 72 - 6x? -12x + 6x - 6 -12x + - 6 - 6 -12x + 6 13 + 6 7- 3 17) (2x + 1 ) 2 Given y = dy dy 3x2 -, find - dx dx - = (2x + 1)2 . 6x + 3x2 . 2 (2x + 1) dy 3x2 . 2 (2x + 1) - (2x + 1)2 . 6x (32 0 2 ) 2 dy 3x2 . 4 (2x + 1) - (2x + 1)2 . 6x dx (32 2 ) 2 dy dx = (2x + 1) . 6x + 3x2 . 4 (2x + 1) 18) Suppose f (x) = 14 . What is f' (x)? Of' (2) = kock-1 Of' (2 ) = (k + 1) 2k-1 Of' ( 2 ) = kick+ 1 Of' (2) = (k+ 1 ) ak + 1 19) Suppose f(x) = x 4/3. What is the slope of the line tangent to O V4 fat x = 2? 9 V4 6 4V4 O 9 4V4