Cho đa thức f(x) = biết rằng f(1)=f(-1); f(2)=f(-2). Chọn câu đúng :

A. f ( x ) = f ( −x) với mọi x

B. f ( x ) = − f ( −x) với mọi x

C. f ( x ) = 2 f ( −x) với mọi x

D. f ( x ) = 3 f ( −x) với mọi x

Use the information given below, to compare the cost of operating two different vehicles for one month (4 weeks) you are considering two different cars. you drive to work, a 20 mile round trip, five days a week. gasoline costs you $1.50 per gallon car agets 28 miles per gallon, would have $300 a year in maintenance costs, and would cost you $1,500 per year to insure car b gets 19 miles per gallon, would have $500 a year in maintenance costs, and would cost you $1,000 per year to insure costs car a car b gas cost per month insurance cost per month maintenance cost per month $ total cost per month