factorise 1 -1/x using identity a2-b2 = (a+b) ( a -b)
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1-1/x
= (x-1)/x
= x-1/x multiplying x+1 in numerator and denominator
= (x-1)/x
= x-1/x multiplying x+1 in numerator and denominator
Ashuxx:
then use identity as usual
ok
hi there
which class??
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