Question

please solve thissss​

Answer 1

Answer:

(i) 2: 3 and 4: 9

We know that

Compound ratio =2/3×4/9

=8/27

=8:27

(ii)4:5,5:7 and 9:11

We know that

Compound ratio =4/5×5/7×9/11

=36/77

=36:77

(iii) (a–b):(a+b),(a+b)2:(a2+b2)and(a4–b4):(a2–b2)2

We know that

Compound ratio =(a–b)/(a+b)×(a+b)2/(a2+b2)×(a4–b4)/(a2–b2)2

By further calculation

=(a–b)/(a+b)×[(a+b)(a+b)]/(a2+b2)×[(a2+b2)(a+b)(a–b)]/[(a+b)2(a–b)2]

So we get

=1/1

=1:1