Question

11 standard chapter 10 exercise questions answer

Find the sum to n terms of the series 5+11+19

Is this right

Elimation method

Formal speech, imagine that you have won NGC award 

show that function f: R> { x€R: -1<x<1} defined by f(x) = x/ 1+|x|, x€R is one one and onto function

Solve by matrix method 

3x-y+2y=13

2x+y-z=3

x+3y-3z=-8

Sir in chapter 6.6.4 question no. 7 I understand whole sum but sir kya aap bataoge root 2 kaise nikla

A trader his goods 20% above the CP he then sells them at a discount at 20% if his cost price is 550 what is his gain or loss and its percentage