@tomleslie 

Dear sir i am a reaserch student and my guide have a maple13 software so which could he given i using thats it.

@Carl Love 

thank you sir well result i got but one more think sir in my problem i used the variables like n, pr... for these values i want to plot,for ex:n=1,2,3,..n .

i mean i want the mutliple lines for various values of n and pr but i dont have idea about these so please can you help me.

@shakuntala 

Good morning sir

first of all i would like to say thanks for my previous problem solved by you.

and now again i have one more doubt sir please can you solve this doubt, dear sir my doubt is

i solved the prblem by using dsolve command but in that i do not know that how to draw multiple lines please can you do that..?? and problem is

sol1 := dsolve([diff(diff(diff(f(eta), eta), eta), eta)+(2.*n/(1+n))(1-(diff(f(eta), eta))^2)+f(eta)*(diff(diff(f(eta), eta), eta)) = 0, diff(diff(theta(eta), eta), eta)+Pr*f(eta)*(diff(theta(eta), eta))-2.*p*Pr*(diff(f(eta), eta))*theta(eta)/(1+n) = 0, f(0) = 0, (D(f))(0) = 1.8+b*((D@@2)(f))(0), (D(f))(4) = 0, theta(0) = 1+s*(D(theta))(0), theta(4) = 0], numeric, method = bvp[midrich])

and for plotting purpose i used this command

odeplot(sol1, [eta, (D(f))(eta)], axes = boxed)

@Preben Alsholm 

yes your right i too tried for it

@tomleslie 

Money does not matter here, fisrt of all i do not know how to update the maple 13

@tomleslie 

Yes, your right it might be only because of that

If you dont mined can you send me , how to download a new version maple, or just you guide me so that i can download it.

@Carl Love 

Yes , your right sir

How to do this not understanding

@tomleslie 

Well, I tried for this program sir but it is showing error delimiter at for conditions also i checked it no where i found that problem,like commas or (, )...

Sorry sir i tried for these commands but i'm not getting the result and when i execute this command showing the error as

Error, (in plot) expecting a real constant as range endpoint but received blt

so please can you find why it is showing this error.

Yes sir your right, and i have one more doubt how to draw more than on line plot by using same code, is it is possible??

yes sir, what you said exactly right, but how it is possible to plot, by using plot command(when x2 doesnt have any value)

Thank you for reply sir

Actually i mean , i should get the value X2=0.3320.., but its not coming for me so that this message