Sida:Arithmetica eller räknekonst.djvu/51

48

De Progressione Arithmetica

Probl.	Sifn.	Sökta	Formler til uplösning
11 12	a.u.s.	d n	${{\div \atop +}a^{2}{+ \atop \div }u^{2}} \over {2s\div a\div u}$ $2s \over {a+u}$
13 14	d.n.u.	a s	$u{\div \atop +}{\overline {n{+ \atop \div }1}}\times d=u_{+}^{\div }dn_{\div }^{+}d$ $nu{+ \atop \div }{1 \over 2}dn{\div \atop +}{1 \over 2}dn^{2}$
15 16	d.n.s.	a u	${2s{+ \atop \div }dn{\div \atop +}dn^{2}} \over 2n$ ${2s{+ \atop \div }dn^{2}{\div \atop +}dn} \over 2n$
17 18	d.u.s	a n	${+ \atop \div }{1 \over 2}d+{\sqrt {{u^{2}}{+ \atop \div }du{\div \atop +}2ds+{d^{2} \over 4}}}$ ${2u+d{\div \atop +}{\sqrt {{\overline {2u+d}}^{2}\div 8ds}}} \over 2d$
19 20	n.u.s	a d	${{2s\div nu} \over n}={2s \over n}\div u$ ${2nu\div 2s} \over {n^{2}\div n}$