[" (a) "(-log2)/(2)" (b) "-(1)/(2)log2qu...

[" (a) "(-log2)/(2)" (b) "-(1)/(2)log2quad " (c) "2log(1)/(2)quad " (d) "-2log(1)/(2)],[" 11.Let "f:R rarr R" be defined by "f(x)=x^(4)" ,check "f" is one-one or not."],[" 12.Write the principal value of "cos^(-1)(cos680^(@))" ."]

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