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Number System Class IX CBSE Important Question for Final Exam Part 2 (in Hindi)
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PART 2 NUMBER SYSTEM CLASS IX CBSE IMPORTANT QUESTION FOR FINAL EXAM

Dr Pratibha Gupta
My name is Dr.pratibha Gupta .I am a teacher . My experience has been in teaching for math and science subject for several years in Delhi.

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Unacademy user
mam in case 1 i want more explanation
Renu Choudhary
3 months ago
Where' s your doubt?? Which step you want me to explain again??
Asrathnisha
3 months ago
how you change r^2 into r21^3
Asrathnisha
3 months ago
how you change r^2 into r21^3
Renu Choudhary
3 months ago
I have changed r^2 into r^3 as the vector form of distance in denominator is converted into magnitude i. e. equal to the magnitude of r.
Asrathnisha
3 months ago
ok mam now cleared
Asrathnisha
3 months ago
thankyou so much mam