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Question-14387




Question Number 14387 by chux last updated on 31/May/17
Commented by chux last updated on 31/May/17
please help me solve no. 11 and 12
$$\mathrm{please}\:\mathrm{help}\:\mathrm{me}\:\mathrm{solve}\:\mathrm{no}.\:\mathrm{11}\:\mathrm{and}\:\mathrm{12} \\ $$

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