Tập nào sau đây là không gian con của R3: a. ( ){ }3123 1,, / 1W==⊂\
b. ( ){ }3123 1,, / 0W==⊂\
c. (){}3123 1 2,, / 1W=+=⊂\
d. ( ){ }3123 2,, / 3W==

Which expressions are equivalent to -6 + 3m

Find the difference (8ab+a+2) - (3ab+6)

One astronomical unit (1 au) is about 1.496 alt tag missing. kilometers. if you wrote this number of kilometers in regular decimal notation (for example, 528 and 3,459 are written in regular decimal notation), how many zeros would your number have?