Question

A=a542+b37+c4+d ;B=ab5d+5c7

hãy so sánh A va B

Answer 1

A=1000a+542+100b+37+10c+4+d

A=1000a+100b+10c+d+583

B=1000a+100b+50+d+500+10c+7

B=1000a+100b+10c+d+557

Ta có B<A

Answer 2

A=1000a+542+100b+37+10c+4+d

A=1000a+100b+10c+d+583

B=1000a+100b+50+d+500+10c+7

B=1000a+100b+10c+d+557

Ta có B<A