springwilliams0
springwilliams0 springwilliams0
  • 16-12-2017
  • Mathematics
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17 and 18 with work. Getting confused

17 and 18 with work Getting confused class=

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tynollette tynollette
  • 16-12-2017
#18:
work out the top part first: 
a/(a(a+h) -(a+h)/a(a+h)=-h/a(a+h)
the top divided by the bottom is equivalent to the top × 1/the bottom:
-h/a(a+h)*1/h=-1/a(a+h)
the numerator is -1, the denominator is a(a+h)
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