Question

Michelle

求解🙏🙏🙏

1.設(a+b):(b+c):(c+a)=3:4:5,則ab:bc:ca=?(9分)

Answer 1

✨ Jawaban Terbaik ✨

Mer

令(a+b)/3 = (b+c)/4 = (c+a)/5 = k
a+b=3k
b+c=4k
c+a=5k
三式相加得2(a+b+c)=12k
a+b+c=6k
故c=3k，a=2k，b=k
所求=2:3:6

Michelle

謝謝你🙏