" The function defined by "f(x)={[1,x in Q],[-1,x in I_(Q)]" is continuous "

If f(x)={x,x in Q;-x,x!in Q then f is continuous at

Find the value of ' a ' if the function f(x) defined by f(x)={2x-1,\ \ \ x 2 is continuous at x=2

" If the function "f(x)=[[x^(2)+px+1,,x in Q],[px^(2)+2x+q,,x in Q]" is continuous at "x=1" and "x=2," then "(p+q)" is equal to "

Is the function defined by f(x)={{:(x+5, ifxlt=1),(x-5, ifx >1):} a continuous function?

Function f(x)={-1,x in Q and 1,x!in Q is continuous at x=0

Is the function f, defined by f(x) = {(x^2, if x le1),(x, if x > 1):} continuous on R?

Is the function f defined by f(x)={x , if""""xlt=1 5, if""""x >1 continuous at x" "=" "0?" "A t" "x" "=" "1?" "A t" "x" "=" "2?

Is the function defined by f(x)={x+5, if x 1 a continuous function?

Is the function f defined by f(x)={(x","ifxle1),(5"," ifx>1):} continuous at x=1?

Is the function defined by f(x)={(x+3,ifxle1),(x-3,ifx>1):} a continuous function? Justify.