Question

1. 11th class kee maths ncrt ki exercises 15.1

mid point theoram orve

I have a suggestion for Q17 in ncert class 11 complex numbers and quadratic equations miscellaneous exercises on chapter 5

(Please bear with me for the image quality)

If we proceed in this way the answer would come quicker

Please let me know how to do in it 

Let R be the relation on the set N of natural numbers defined by R={(a,b):a+3b=12,a,bEN}

Please help me with this

Bank a/c is a personal a/c or a real a/c?

A cone of height 24cm and radius of base 6cm is made of modelling clay. A child reshapes it in form of a sphere . Find radius of sphere