6^n*2^2 6^n*4
------------- = ----------- =4
2^n*3^n 6^n
А) y' =<u> 4x³ (x-2) - (x⁴ -12)</u> = <u>4x⁴ -8x³ -x⁴+12</u> = <u>3x⁴ -8x³ +12</u>
(x-2)² (x-2)² (x-2)²
б) y' = 2x*sin2x + 2x² cos2x
4 - 1 2/3=4 - 5/3=12/3 - 5/3= 7/3 = 2 1/3
11 2/5 : 3 4/5=57/5 : 19/5=57/5 . 5/19 = 57.5/5.19=3