Mathematics: Post your doubts here!

[ayeshaK]

f(x)=1/6x+5 and g(x)=1/2x+1 show that the equation fg(x) = 1/5 has no roots.

 

[iKhaled]

f(x)=1/6x+5 and g(x)=1/2x+1 show that the equation fg(x) = 1/5 has no roots.

what paper is this or is it 1/6x + 5 and 1/2x + 1 or 1/2x+1 as in 2x+1 the denominator?

 

[Rutzaba]

f(x)=1/6x+5 and g(x)=1/2x+1 show that the equation fg(x) = 1/5 has no roots.

x se x cancel

 

[Rutzaba]

u wud get after simplifying 10x +5 = 11+ 10x

 

[Soldier313]

a2 math



please can someone help

 

[Rutzaba]

a2 math

View attachment 18957


please can someone help

* break e^( 2x+y) into e^2x multiplied by e^y or (e^2x)(e^y)

* take y onto the side of dy and place x onto other side of equation where dx is

Dy (1 / e^y) = dx (e^2x)

* integrate both sides placing a c on the x hand side.
it will give you
Dy (e^-y) -------> -e^ -y
Dx (e^ 2x) ---------> 2e^2x

Thus -e^ -y = 2e^2x +c

* now place values of x n y to take out value of c wch wud b -1.5

* place the value of c into formula = last line of 3rd * above

 

[Rutzaba]

Rearrange and you make y the subject of formula you will get y = ln (-2/ ((e^2x) -3)

 

[Rutzaba]

a2 math

View attachment 18957

please can someone help

Did u understand? Can u chk n tel me if my answers ryt?

 

[Soldier313]

Rearrange and you make y the subject of formula you will get y = ln (-2/ ((e^2x) -3)

Thanx a lot sis!

Did u understand? Can u chk n tel me if my answers ryt?

yup twas right just that ms states the answer as : y = ln(2 /(3 − e 2 x ))
thanx

 

[sma786]

Find the value of the term which is independent of x in the expansion of (x+3/x)^4

And people, does anyone have good notes on math ? Radians, binomial theorm and all, my teacher is the worst teacher and i need some help ! Thankyou <3

 

[Rutzaba]

Find the value of the term which is independent of x in the expansion of (x+3/x)^4

And people, does anyone have good notes on math ? Radians, binomial theorm and all, my teacher is the worst teacher and i need some help ! Thankyou <3

4c2( x^2) ((3/x) ^2)
54

 

[sma786]

4c2( x^2) ((3/x) ^2)
54

but the questions asks the inpendent of x, ur taking x2

 

[Soldier313]

please solve this and explain find the equation of two lines through the origin which are inclined at 45 degree to the line 2y+x=0 please tell me frome where this question is?

http://themediaeducation.com/educat...uestion-cWEtMjAxMjA1MTAwMjE5NThBQUY0ajVu.html

found the qn and soln here.

 

[Rutzaba]

but the questions asks the inpendent of x, ur taking x2

but the questions asks the inpendent of x, ur taking x2

Hunz x^2 in numerator would be cancelled by x^2 in denominator

 

[Rutzaba]

please solve this and explain find the equation of two lines through the origin which are inclined at 45 degree to the line 2y+x=0 please tell me frome where this question is?

did u get the solution? or do wan me to do it for u?

 

[Soldier313]

Aoa wr wb
Can someone please help me with part iii) of this qn?

please provide detailed step-by-step explanation, i didn't understand the ms here:/





whitecorp and everyone else. thanx a million.

 

[salvatore]

Please help me find the coefficient in the paper below; no. 1
http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Mathematics (9709)/9709_s03_qp_1.pdf

 

[Alice123]

no 8(ii) n (iii)
http://papers.xtremepapers.com/CIE/...S Level/Mathematics (9709)/9709_s10_qp_21.pdf
Can any1 help??????

 

[Alice123]

express cos^2(2x) in terms of cos4x..... pls help

 

[Beca1206]

Hey guys, I'm having some trouble with this A2 statistics question. I can't quite figure it out, please help :{

The heights of a population of male students are distributed normally with mean 178cm and standard deviation 5cm. The heights of a population of female students are distributed normally with mean 168cm and standard deviation 4cm. Find the probability that a randomly chosen female is taller than a randomly chosen male.