Mapping `f : R to R` which is defined as `f (x) = cos x,x in R` will be

81. A mapping f:R rarr R R which is defined as f(x)=cos x;x in R is: (a) oniy one-one (b) only onto (C) one-one onto (d) Neither one-one nor onto

If f:R to R is defined by f(x)=|x|, then

If f:R to R is defined by f(x)=|x|, then

If function f R to R is defined by f (x) = 2x + cos x, then

Let, f: R rarr R be defined by f(x) = 2x + cos x, then f