maths doubt
root x+2 >= x
I need to know if this is correct or no :
Using wavy curve method x belong to [-1,2]…..1
x is defined only when it is greater than or equal to -2……..2
So from 1, 2 will x belong to [-2,2] ?
Please correct me if I went wrong somewhere
19 Replies
@Apu
Note for OP
+solved @user1 @user2... to close the thread when your doubt is solved. Mention the users who helped you solve the doubt. This will be added to their stats.That is what I thought but -2 satisfies eqn and also is the ans in the key
that would be always correct, no?
(my bad, i didn't see the root part)
do I have to chnage the inequality somewhere ?
Bc if not then -2 does not satisfy the equation after squaring on both side but satisfies the og eqn and also x is negative/positive so idk what to do with the symbol
you should make 2 cases
after squaring, x>0 and x<0, then take union.
Ah right makes sense, let me try
both cases banake u get, [0,2] n [-2,0] then union gives [-2,2]
Wait ur getting 0 ? @Slembash
But yah tysm I got [-2,2]
ji 🙏
i hope the hint helped?
Yes yes it did, it did not cross my mind that I can take it as two which was quite dumb of me lol, I am just waiting for slembash to respond and I’ll close the doubt :]
no worries! 😄 happy to help 👍
sorry phone died
Oh ok np, the real question is did u get 0 ?
how to solve these type of questions
i can give you hint : write 1 + sin(x) as sin^2(x/2) + cos^2(x/2) + 2sin(x/2)cos(x/2), and as you can see, this is a perfect square.
@DaddyCalling268
hello! is this doubt sorted? Can we mark it as solved if so?
Hello, yah sorry totally forgot , I was waiting for slembash to reply lol
+solved @Deleted User @Slembash
Post locked and archived successfully!
Archived by
<@821702877721657374> (821702877721657374)
Time
<t:1719059017:R>
Solved by
<@1221329740959318107> (1221329740959318107), <@1165653012996444253> (1165653012996444253)