Answer :

=

=


=


= ………….. eq (1)


=


=


=


= ………….. eq (2)


=


=


=


= ………………eq (3)


Now, subtracting eq (3) from the addition of eq (1) and eq (2).


+ =


+


Now, rationalising the terms


+


= +


= +


= +


= +


= +


=


= =


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