Question

find the range of x*x -5x+6>0

Answer 1

do you know what is the product roots formula for
\(ax^2+bx+c =0\)
?

Answer 2

**product of roots

Answer 3

c/a

Answer 4

for \(ax^2+bx+c =0\)
product of roots = \(\large \dfrac{c}{a}\)

so for \(5x^2+14x+k=0\)
what will be the product of roots ?

Answer 5

identify c and a for 5x^2 +14x+k

Answer 6

k/5

Answer 7

correct!
now since , one root is reciprocal of other, their product will be 1 !!

Answer 8

so,
get k from

k/5 =1

piece of cake :P

Answer 9

what is meaning of reciprocal rootd dude

Answer 10

ohh!

reciprocal means if one root is a, then other is 1/a !

their product = a*(1/a) =1

Answer 11

so,here they didn't tell that product of the roots are reciprocal

Answer 12

no, roots are reciprocal
like a and 1/a

from that we got that product of roots must be 1

hence we took, c/a = k/5 = 1

Answer 13

makes sense ?

Answer 14

ya.i got it.thank u.

Answer 15

may iknow from which country u r?

Answer 16

welcome ^_^
I am Indian :)

Answer 17

Since you're new here,
\(\Huge \mathcal{\text{Welcome To OpenStudy}\ddot\smile} \)

Answer 18

state?

Answer 19

this is the question from oracle interview

Answer 20

oh! best of luck for your preparations for the interview :)

Answer 21

if first term of AP is 5 .16th term is 45.find the sum of first 16
terms.

Answer 22

know the formula for n'th term of AP and sum of terms in AP ?

Answer 23

a+(n-1)d

Answer 24

n(n+1)/2

Answer 25

\(\Large S_{16} = \dfrac{16}{2}(a_1+a_{16})\)

Answer 26

general formula is
\(\large S_n = (n/2)(a_1 +a_n)\)

Answer 27

how u got this one

Answer 28

There are 2 formulas for the sum, the one i posted and other is :
\(\large S_n = (n/2)(2a+(n-1)d)\)

Answer 29

since we know first and last term, using first formula is much easier and faster! :)

Answer 30

this one i know

Answer 31

i studied second one in r.s.agarwal

Answer 32

both formulas are equally important :)

Answer 33

from which state u r?

Answer 34

i messaged you

Answer 35

It not good to disclose personal information on the internet ...

Answer 36

*Its

Answer 37

just state only i asked u.if u have any problem leave it

Answer 38

ok :)

Answer 39

is it possible to find using second formula

Answer 40

ofcourse!
but it would be a longer method.

Answer 41

there 15d=40

Answer 42

correct!

Answer 43

then what is the next step

Answer 44

you have a1, and d, and n
whats stopping you from using the formula you know!

Answer 45

ok

Answer 46

15 d =40
d= 40/15 = 8/3

Answer 47

find the range of x*x -5x+6>0

Answer 48

ask new question in new post :)

Answer 49

find the range of x*x -5x+6>0