Mệnh đề phủ định của mệnh đề: 2
" Î + + > x R x x , 5 0
là
A.
2
$ Î + + £ x R x x , 5 0 . B.
2
" Î + + £ x R x x , 5 0
C.
2
$ Î + + < x R x x , 5 0 . D.
2
" Î + + < x R x x , 5 0.

The fraction of defective integrated circuits produced in a photolithography process is being studied. a random sample of 300 circuits is tested, revealing 17 defectives. (a) calculate a 95% two-sided confidence interval on the fraction of defective circuits produced by this particular tool. round the answers to 4 decimal places. less-than-or-equal-to p less-than-or-equal-to (b) calculate a 95% upper confidence bound on the fraction of defective circuits. round the answer to 4 decimal places. p less-than-or-equal-to

The areas of two similar triangles are 72dm2 and 50dm2. the sum of their perimeters is 226dm. what is the perimeter of each of these triangles?

Evaluate each expression. determine if the final simplified form of the expression is positive or negative -42 (-4)2 42