-[-oo]

y= f(x) is a polynomial function passing through point (0, 1) and which increases in the intervals (1, 2) and (3, oo) and decreases in the intervals (-oo,1) and (2, 3). If f(1)= -8, then the range of f(x) is (a) [3,oo) (b) [-8,oo) (c) [-7,oo) (d) (-oo,6]

Let f be the function f(x)=cosx-(1-(x^2)/2)dot Then (a) f(x) is an increasing function in (0,oo) (b) f(x) is a decreasing function in (-oo,oo) (c) f(x) is an increasing function in (-oo,oo) (d) f(x) is a decreasing function in (-oo,0)

Let f be the function f(x)=cosx-(1-(x^2)/2)dot Then (a) f(x) is an increasing function in (0,oo) (b) f(x) is a decreasing function in (-oo,oo) (c) f(x) is an increasing function in (-oo,oo) (d) f(x) is a decreasing function in (-oo,0)

According of Kohlrausch law, the limiting value of molar conductivity of an electrolyte A_(2)B is (a) lambda^(oo) ._(A^(+)) + lambda^(oo) ._((B^(-)) (b) lambda^(oo) ._(A^(+)) - lambda^(oo) ._(B^(-)) (c) 2lambda^(oo) ._(A^(+)) +(1)/(2)lambda^(oo) ._((B^(-)) (d) 2lambda^(oo) ._(A^(+)) + lambda^(oo) ._(B^(-))