23rd q

23rd q "the sum Mm temu«.n is 'h (m • n)th tenn is the negative ofthe ten, e Same as the sum n terms. then snow mat the ) An AP.. has h • 1 sum of as even terms prove 'ha' S, - S. A r,d, where A is the cornrnon difference. the ratio Ot the Sun m terms and n terms an A,p, be Prove that the Fin"' and ten•ns ) (2n S - Sym S4, sw. ale in rnd out the cornmon diffelence

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