已知3m=a,3n=b,分别用a、b表示3m+n和32m+2n.
∵3m=a,3n=b
∴3m+n=3m?3n=ab;
32m+2n=32m?32n=(3m)2?(3n)2=a2b2.
客户交易记录包括哪些内容?
Battery-operated slippers are used for _______ and were invented by _______. [ ]
A. seeing in the dark; Chelsea Lanmon
B. seeing in the dark; Julie Tompson
C. scooping really cold ice cream; Jayce Coziar
D. changing the style of the shoes; Jamic Ellsworth