117)b i think
i have started this thread to get solutions for the problems that i cant solve in any chapters.So pls dont make fun of the pbms if i asked foolish qns,and pls solve these pbms and give their full solns or hints.i will be very happy if u give useful hints rather than giving the full solns.Please help this poor boy preparing for jee 2009.
1)A function f(x) is continous on R and periodic with period 2∩ satisfies
f(x)+sinx.f(x+∩)=sin2x then 0∫∩/2f(x)dx=____
2)Consider those functions f that satisfy f(x+4)+f(x-4)=f(x)
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19 Answers
1hey msp arent des of maths musing......infact 9 th and 10 th r my doubts too....
39)A,B,C,D produced 18 films,5 films jointly by A and C ,4films by A and D,4 films by A and D .4 films by B and C and 5 films by B and D/The number of ways of selecting 8 films out of 18 so that the selected ones belong equally to the four producers is _________
10)If two regular hexagons are inscribed in a circle of unit radius,the minimum area common to the hexagons is_____
tiitians pls help me .i am not getting any reply.pls post ur solns
3integrations pls wait i have to post my dbt question.
An equilateral triangle has its vertices on the axes of coordinates and area √3 syuare units.The coordinates of the orthocenter of the triangle are _____
1u mean if lmn r dirctional cosines den wich relation holds u wan that q ?
9@ msp post 5
its not 0 induced electric fields dont need medium
62These are not very trivial .. so dont feel ashamed or anything..
any one hwo makes fun should be...
f(x)+sinx.f(x+∩)=sin2x then 0∫∩/2f(x)dx=____
substitute x=x+∩
f(x+∩)+sinx.f(x)=sin2x then 0∫∩/2f(x)dx=____
does this help u in any which way? to take it further.. i think that this will give the solution.. (not straightforward yet!)
15. i think it should be d) may decrease if charge is negative and c)
35)A point charge is brought in an electric field,The electric field at a nearby point
a)will increase if the charge is positive
b)will decrease if the charge is negative
c)may increase if the charge is positive
d)may decrease if the charge is negative
6)As the pressure over a mixture of toluene(vapour pressure =400 torr)and xylene (vap pressure=600 torr) is decreased it begins to vapourise.The first bubble of vapour thus generated contains
a)toluene b)pure toluene c)toluene and benzene d)nothing can be said
7)Which of the following will absorb only water vapour from a mixture of O2,SO2,CO2 and water vapour
a)alk pyrogallol b)conc.H2SO4 c)NaOH
34)Let f(x) and g(x) be polynomial with real coefficient of degree n+1 and n resp.where n >0 with leading coefficients A,B respectively then
limn→∞g(x) 0∫x(ef(t)-f(x)dt in terms of A,B and n is ____
33)i didnt get the ans for the second sir actually i have also done upto wat u did sir.can u pls give the full soln pls sir.
3i got ans zero becos there is no magnetic field in the place where the arc is present.But fiit jee has given another ans
62f(x+4)+f(x-4)=f(x)
substitute x=x+4
f(x+8)+f(x)=f(x+4)
take sum of both
f(x+8)+f(x-4)=0
now there is one more step....
Hint: answer is 24