If `a ,\ b\ a n d\ c\ a r e\ ` respectively the coefficients of `x^2` in ` x^2,\ 2x^2+x` and `2x-x^2` respectively, then `a+b+c=` 0 (b) `-2` 2 (d) `-1`

If A and B are the coefficients of x^(n) in the expansion (1+x)^(2n) and (1+x)^(2n-1) respectively,then

In the product of (9x ^(2)+ 15 -x) and (-1 -x + x ^(2)), if A, B and C are the coefficients of x ^(3), x ^(2) and x respectively, then the value of (A+B-C) is

If a\ a n d\ b denote the sum of the coefficients in the expansions of (1-3x+10 x^2)^n a n d\ (1+x^2)^n respectively, then write the relation between a\ a n d\ bdot

If a. b, c and d are the coefficients of 2nd, 3rd, 4th and 5th terms respectively in the binomial expansion of (1+x)^n, then prove that a/(a+b) + c/(c+d) = 2b/(b+c)

Let f,\ g\ a n d\ h be real-valued functions defined on the interval [0,\ 1] by f(x)=e^x^2+e^-x^2,\ g(x)=x e^x^2+e^-x^2\ a n d\ h(x)=x^2e^x^2+e^-x^2 . If a , b ,\ a n d\ c denote respectively, the absolute maximum of f,\ g\ a n d\ h on [0,\ 1], then a=b\ a n d\ c!=b (b) a=c\ a n d\ a!=b a!=b\ a n d\ c!=b (d) a=b=c

If the maximum and minimum value of sin sin x is a and b respectively and the maximum and minimum value of cos cos x is c and d respectively then a^(2)+b^(2)+c^(2)+d^(2):(A)1+a^(2)(B)2+a^(2)(C)3+a^(2)(D)4+a^(2)