x = 2436:12

x = 203

6.x-5 = 613

6.x = 613+5

6.x = 618

x = 618:6

x = 103

\(=\sqrt{-5x^2+10x-5+16}=\sqrt{-5\left(x^2-2x+1\right)+16}=\sqrt{-5\left(x-1\right)^2+16}\le\sqrt{16}=4\)

Vậy GTNN là 4 tại x = 1 

Mark the letter A, B, C or D to indicate the sentence that best combines each pair of sentences in the following questions.

Question 30: It was an interesting novel. I stayed up all night to finish it.

A. The novel was so interesting that I stayed up all night to finish it.

B. Though it was an interesting novel, I stayed up all night to finish it.

C. I stayed up all night to finish the novel so it was interesting.

D. Unless it were an interesting novel, I would not stay up all night to finish it.