Ratio & Proportion Exercise 7.1 Q2 Class X ICSE | IIT JEE Find the compounded ratio 2 : 3 and 4 : 9

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Find the compounded ratio of:
(i) 2 : 3 and 4 : 9
(ii) 4 : 5, 5 : 7 and 9 : 11
(iii) (a – b) : (a + b), (a + b)2 : (a2 + b2) and (a4 – b4) : (a2 – b2)2

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X³+12x/6x²+8=y³+27y/9y²+27
How to solve this????

rajsaheb
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Sir yek bada video bna dijiye pura exercise ka

RajRaj-fkvd