Q 17 please Q12: If x + y = 10, then the largest possible product xy is = A)50 B) 25 C) 24 D) 10B)-2Q13:The absolute maximum value of f(x)=x²-3x² - 9x + 25 on the interval (-5,4) is =A) has no absolute maximumC) 14D) 30Q14: If f(x) = (x²-4)² then at the point () there is:A) relative maximumB) relative minimumA)B) ∞Q15: limx-001+5x²-16Q16: f(x)=x²-5x+4C)inflection pointQ18: lim esc(x+h)-cscx7-0hS-7 Sinis discontinuous at: A) x = 1 B) x = 4 C) x = 1 and x = 4 D) x = -1 and x = -4C)-00D) absolute maximum.Q17: If the line 2x + 3y = 5 is tangent to the graph of y = f(x)at x = 1, then f'(1) =A) ²C)D)== A)-cscx cotx B) cscx cotxQ25: If f(x)= xl, g(x) = 3√x-2, then the domain of (A) [0, U,00)B) (0,3) U (3,00)D) d. n.e(4)(x) is:C) R-C) secx cotxQ19: If siny = x thenA)sec²y tanyB) secy tanyQ20: If y=5-x², find Ay and dy at x = 2, with dx = Ax = 0.1Ay=0.41, dy = 0.4 B)4y= -0.4, dy=-0.41 C)Ay = -0.41, dy=-0.4 D)Ay = -0.41, dy = 0.4Q21: If f(x) = √2x-1 +3,then the domain of f-¹(x) is: A) [0,3] B) [0,00) C), D) [3,00)D) 2(x - 5)Q22: Iff (2x-3)=x+1, then f(x)= A)(x-5) B)/(x+5)Q23: If f(x)=√x, g(x) = 4-x², then the domain of fog(x) is: A)RQ24: If L = 4w, A = wl, if L is a function of A then L = f(A) = A) VAC)2(x+5)B)[-2,2] C) (-∞, -2] U [2,00) D) [2,00)B)√ZAD) 2√ĀD)-secxcotxC) secy tan²y D) -sec²y tanyD) R-{}}C)

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18 Q16: f(x) giả5044 Q17: If the line 2x + 3y = 5 is tangent to the graph of y = f(x)at x = 1, then f'(1) A)-² B) C) D)=2 secx cotx D)-secxce