Question

Help
f(x)=[x]x^2 1≤ x <3
find dy/dx
explain the derivative of the [x] plz!!!

Answer 1

@ikram002p @ganeshie8

Answer 2

u wanna the derivative of [x]
or the derevative of f(x) ?

Answer 3

derivative of f(x)

Answer 4

i know that the deravative of [x] = 0 right ?

Answer 5

right !

Answer 6

so what's the derivative of f(x)

Answer 7

so u have f(x)=[x]x^2
f'(x)=[x]' x^2 + [x] (x^2)'
right ?

Answer 8

f'(x)=0+2[x]x
got it nw ?

Answer 9

yep and it will be
2x[x] right ?

Answer 10

ur correct !

Answer 11

r u متأكدة ؟

Answer 12

i used to find the derivative like that but someone told me that it's wrong o.O

Answer 13

and u also can explain it more
[x] = 1 , x<=1
[x]=2 , 1<x<2
[x]=3 , 2<x<3
so..
f'(x)=2[x] x
so,,, the rest u know
f'(x) = 2x , x=1
f'(x)=4x , 1<x<=2
f'(x)=6x , 2<x<=3

Answer 14

واضح :P

Answer 15

واضح بس الحل الاول يختلف عن الحل الثاني

Answer 16

la nafs el7al , entabeh mnee7 !
ana 2sta5damet f'(x)=2[x]x men al7al al2awal
bel 7al 2lthanee ana bass 3edet ta3reef [x] !
fa jawabak mosh 3'ala6 XD
laken fe nas bet7eb 2lfalsafeh XD

Answer 17

XD lol !!!

Answer 18

thanx alot

Answer 19

huh , but u got it ?

Answer 20

u know ur wlc any time ^^

Answer 21

yeah i got it :)