Tutor profile: Shubham Y.
Subject: Linear Algebra
What is the rank of identity matrix of order 2.
rank=no of non zero rows so rank =2
A rectangle has its perimeter of 400m and its length L is three times of its width W.Find L and W.
Perimeter of rectangle=2L+2W so as given: 2L+2W=400 also given that L=3W so 2(3W)+2W=400 8W=400 W=50m L=3*50=150m
|x-3|+|x-5|; if 3<x<5 SOLVE!!
as 3<x<5,so x-3>0.so |x-3|= (x-3) and x-5<0,so |x-5|= -(x-5) now use it =(x-3)-(x-5)=x-3-x+5=2
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