Question: PLEASE NEED HELP ASAP Problem 7. (1 point) 81 + 2 Let f(x) = In 1/ Then, 5x - 2 f'(z) = Problem 8. (1

PLEASE NEED HELP ASAP

Problem 7. (1 point) 81 + 2 Let f(x) = In 1/ Then, 5x - 2 f'(z) = Problem 8. (1 point) dy Find for the function y = a 2 cos(z) dy = dr Problem 9. (1 point) Let f(x) = (-9x] + 7)*(3x] - 4)". Then, f'(x) =
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