<span>a, để pt có nghiệm thì denta ≥ 0 <=> (3-m)^2 - 4( 3-2m) ≥ 0 <=> m^2 +2m-3 ≥ 0 ( ^ là mũ)
giải bpt mới tìm được đó ta đc : m ≤ -3 hoặc m ≥ 1
b, * Xét m-1=0 <=> m=1 => thay m=1 vào pt thì pt có 1 nghiệm là 1/8 (1)
* Xét m-1 ≠ 0 <=> m ≠ 1
=> pt có nghiệm khi denta' ≥ <=> (m+3)^2 - (m-1)(-m+2) ≥0 <=> 2m^2 +3m+11 ≥ 0 (*)
-> bpt (*) có denta < 0 nên nó luôn đúng với mọi m ≠1 -> denta của pt đã cho luôn > 0 với mọi m ≠ 1 (2)
từ (1) (2) => với mọi m pt luôn có nghiệm </span>
Marcus shoes: 35.99(5.5%)= (about) $1.98(tax) so 35.99+1.98= 37.97
Tia shoes: 39.99(9%)= (about)3.60 (tax) so 39.99+3.60=43.59
However it’s 15% off so 43.59(15%)= 6.54 so 43.59-6.54= 37.05
The difference is 0.92
Yes,you can.
-- If it's a rectangle, make it more square ... make the length and width
more nearly equal.
-- No matter what shape it is, make it more like a circle. The circle
has the most possible area inside the smallest possible perimeter.
To find the mean just add all the numbers together then divide them by how many numbers there are.
To find the median you have to rewrite the list in numerical order then pick out the middle one which will be your answer
The mode is the number that is repeated more often than the others
For range pick out the largest and smallest number in the group and subtract those, the value you get will be the range :) Hope this helped
Yes there are, an ounce is smaller than a pound
