1st =a,2nd=b then d=b-a, tn=c find the value of n and find sn tn =a+(n-1)d c=a+(n-1)(b-a) there fore n=c+b-2b/b-a now substitute the value of n Sn=n/2(a+c) sn=(a+c)(c+b-2a)/2(b-a)
On Wed, Dec 21, 2016 at 8:07 PM, Murthy Bannadar <[email protected]> wrote: > Show that the sum of an AP whose first term is 'a', second term is 'b' > &the last term is 'c' is equal to (a+c)(b+c-2a)/2(b-a) > > On Dec 13, 2016 8:11 PM, "manjunatha SR" <[email protected]> > wrote: > > > > > > -- > > 1. If a teacher wants to join STF, visit http://karnatakaeducation.org. > in/KOER/en/index.php/Become_a_STF_groups_member > > 2. For STF training, visit KOER - http://karnatakaeducation.org. > in/KOER/en/index.php > > 4. For Ubuntu 14.04 installation, visit http://karnatakaeducation.org. > in/KOER/en/index.php/Kalpavriksha > > 4. For doubts on Ubuntu, public software, visit > http://karnatakaeducation.org.in/KOER/en/index.php/ > Frequently_Asked_Questions > > 5. Are you using pirated software? Use Sarvajanika Tantramsha, see > http://karnatakaeducation.org.in/KOER/en/index.php/Why_public_software > ಸಾರ್ವಜನಿಕ ಇಲಾಖೆಗೆ ಸಾರ್ವಜನಿಕ ತಂತ್ರಾಂಶ > > --- > > You received this message because you are subscribed to the Google > Groups "Maths & Science STF" group. > > To unsubscribe from this group and stop receiving emails from it, send > an email to [email protected]. > > To post to this group, send email to [email protected]. > > Visit this group at https://groups.google.com/group/mathssciencestf. > > For more options, visit https://groups.google.com/d/optout. > > -- > 1. If a teacher wants to join STF, visit http://karnatakaeducation.org. > in/KOER/en/index.php/Become_a_STF_groups_member > 2. For STF training, visit KOER - http://karnatakaeducation.org. > in/KOER/en/index.php > 4. For Ubuntu 14.04 installation, visit http://karnatakaeducation.org. > in/KOER/en/index.php/Kalpavriksha > 4. For doubts on Ubuntu, public software, visit > http://karnatakaeducation.org.in/KOER/en/index.php/ > Frequently_Asked_Questions > 5. Are you using pirated software? Use Sarvajanika Tantramsha, see > http://karnatakaeducation.org.in/KOER/en/index.php/Why_public_software > ಸಾರ್ವಜನಿಕ ಇಲಾಖೆಗೆ ಸಾರ್ವಜನಿಕ ತಂತ್ರಾಂಶ > --- > You received this message because you are subscribed to the Google Groups > "Maths & Science STF" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To post to this group, send email to [email protected]. > Visit this group at https://groups.google.com/group/mathssciencestf. > For more options, visit https://groups.google.com/d/optout. > -- 1. If a teacher wants to join STF, visit http://karnatakaeducation.org.in/KOER/en/index.php/Become_a_STF_groups_member 2. For STF training, visit KOER - http://karnatakaeducation.org.in/KOER/en/index.php 4. For Ubuntu 14.04 installation, visit http://karnatakaeducation.org.in/KOER/en/index.php/Kalpavriksha 4. For doubts on Ubuntu, public software, visit http://karnatakaeducation.org.in/KOER/en/index.php/Frequently_Asked_Questions 5. Are you using pirated software? Use Sarvajanika Tantramsha, see http://karnatakaeducation.org.in/KOER/en/index.php/Why_public_software ಸಾರ್ವಜನಿಕ ಇಲಾಖೆಗೆ ಸಾರ್ವಜನಿಕ ತಂತ್ರಾಂಶ --- You received this message because you are subscribed to the Google Groups "Maths & Science STF" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send an email to [email protected]. Visit this group at https://groups.google.com/group/mathssciencestf. For more options, visit https://groups.google.com/d/optout.
