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If the function f(x) given by f(x)={3a x...

If the function `f(x)` given by `f(x)={3a x+b ,\ \ \ if\ x >1\ \ \ \ \ \ \ \ \ \11, if x=1\ \ \ 5a x-2b, if x<1` is continuous at `x=1` , find the values of `a` and `b` .

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