math doubts [NEW]

[nid404]

whatever way u like

You can do that right??

[slvri]

You can do that right??

yup

[astarmathsandphysics]

yeah..then..how can it be less than -5 and greater than 3 at the same time??

x<-5 OR x>3


NOT x<-5 AND x>3

[slvri]

x<-5 OR x>3


NOT x<-5 AND x>3

whoops.....meant to say that both of these are the possible solution sets

[Ghost Of Highbury]

ok...so the final answer is ..... x>5 and x<-3

[nid404]

ok...so the final answer is ..... x>5 and x<-3

plot it and check it if you r still not sure

[Ghost Of Highbury]

its correct...slvri PMed me abt it....

[coolcar221]

Can anyone please help me to solve this problem?
find the set of values of k for which y=kx-4 intersects the curve y=x^2-2x at two distinct points

[astarmathsandphysics]

explained here

http://www.astarmathsandphysics.com/a_level_maths_notes/C1/a_level_maths_notes_c1_using_the_discriminant_to_find_the_number_roots_of_a_quadratic_curve.html

[astarmathsandphysics]

Can anyone please help me to solve this problem?
find the set of values of k for which y=kx-4 intersects the curve y=x^2-2x at two distinct points
so
so with


or

[simba]

guyz i need help........

Q: f(x): 3-2sinx , for 0<x<360   (its greater than or equal & less than or equal)

find the range of f

[slvri]

guyz i need help........

Q: f(x): 3-2sinx , for 0<x<360   (its greater than or equal & less than or equal)

find the range of f

ok..........u know that the sine function is always between -1 and 1 (max 1 and min -1). so when sinx=1, f(x)3-2sinx=3-2(1)=3-2=1(min)
and when sinx=-1, f(x)=3-2(-1)=3+2=5(max)
so 1<=f(x)<=5

[simba]

Thanks

[simba]

i gt a question bt nt abt fuctions.............in june 06 .....num.3 ..how do i get the rate in decimal rather than the percentage ?

[slvri]

i gt a question bt nt abt fuctions.............in june 06 .....num.3 ..how do i get the rate in decimal rather than the percentage ?

um can u post the question here?