If `(x+1/x)=3` then `(x^8+1/x^8)` is equal to

If x=3-sqrt(8), then x^3+1/(x^3) is equal to (a)6 (b) 198 (c) 6sqrt(2) (d) 102

If the middle term of (x + 1/x"sin"^(-1)x)^(8) " is equal to (630)/(16) , the value of x is/are

If 8f(x)+6f(1/x)=x+5 and y=x^2(f(x), then (dy)/(dx) at x=-1 is equal to (a)0 (b) 1/(14) (c) -1/4 (d) None of these

If 8f(x)+6f(1/x)=x+5 and y=x^2(f(x), then (dy)/(dx) at x=-1 is equal to 0 (b) -1/(14) (c) -1/4 (d) None of these

lim_(x to 1//2) (8x^(3) - 1)/(16 x^(4) - 1) is equal to

8.If .If y=x^(2)+(1)/(x^(2)+(1)/(x^(2)+x^(2)+...) ,then (dy)/(dx) is equal to

If x =1 +2+(4)/(2!)+(8)/(3!)+(16)/(4!)+… then x^(-1) is equal to

"If "y=(root(3)(1+3x)root(4)(1+4x)root(5)(1+5x))/(root(7)(1+7x)root(8)(1+8x)), then y'(0) is equal to -

"If "y=(root(3)(1+3x)root(4)(1+4x)root(5)(1+5x))/(root(7)(1+7x)root(8)(1+8x)), then y'(0) is equal to -

If the middle term in the expansion of ((1)/(x)+x sinx)^(10) is equal to 7(7)/(8) , then the principal value of x is: