1.

f(x) = {{:(a tan^(-1) ((1)/(x-4)) " if " 0 le x lt 4),(btan^(-1) ((2)/(x-4)) " if " 4 lt x lt 6),(sin^(-1) (7-x) + 0 (pi)/(4)" if " 6 le x le 8):}andf(4) = pi //2 is continuous on [0,8] then (a,b) =

Answer»

(1,1)
(1,-1)
(-1,1)
(-1,-1)

ANSWER :C


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