(x^5 ln x)' = 5x^4 ln x + x^4 = x^4(5ln x + 1)
(e^(1-7x))' = -7e^(1-7x)
cos(0.2x-5)' = -0.2sin(0.2x-5)
f'(x) = 1/x^2, f'(1) = 1/1^2 = 1, so a = 1
f'(x) = 2x + 3, f'(2) = 2(2) + 3 = 4 + 3 = 7, so a = 7
(x^5 ln x)' = 5x^4 ln x + x^4 = x^4(5ln x + 1)
(e^(1-7x))' = -7e^(1-7x)
cos(0.2x-5)' = -0.2sin(0.2x-5)
f'(x) = 1/x^2, f'(1) = 1/1^2 = 1, so a = 1
f'(x) = 2x + 3, f'(2) = 2(2) + 3 = 4 + 3 = 7, so a = 7