If `(x-1/x)=sqrt(21)` , the value of `(x^2+1/(x^2))(x+1/x)` is (a) 42 (b) 63 (c) 115 (d) 120 (e) 125

If x = (5-sqrt(21))/2 , find the value of x+(1)/(x)

If x - (1)/( x) = sqrt21, then the value of (x ^(2) + (1)/( x ^(2))) (x + (1)/(x)) is

The value of (1-x^4)/(1+x)+(1+x^2)/xxx1/(x(1-x)) is (a) 1 (b) 1-x^2 (c) 1/x (d) 1+x (e) None of these

The maximum value of (log x)/(x) is (a) 1 (b) (2)/(e)(c) e (d) (1)/(e)

The minimum value of e^((2x^(2)-2x+1)sin^(2)x) is e(b)(1)/(e)(c)1(d)0

If f(1)=1 , f'(1)=2 , then find the value of lim_(x rarr1)(sqrt(f(x))-1)/(sqrt(x)-1) (A) 2 (B) 4 (C) 1 (D) (1)/(2)

1.If |[2x,-1],[4,2]|=|[3,0],[2,1]| ,then value of x is (a) 3 (b) 2/3 (c) 3/2 (d) -1/4

If 2x = sqrt(a) - (1)/(sqrt(a)) , then the value of (sqrt(x^(2) + 1))/(x + sqrt(x^(2) +1)) is

If 10^(x)=64, what is the value of 10^((x)/(2))+1?18 (b) 42(c)80(d)81