Question

Rezolva 2 ecuatii(macar la 1 dati-mi raspuns): 15 PUNCTE
a). 15+bc SUPRA ad, daca a SUPRA b =c SUPRA d

b). afla ac si bd, daca a SUPRA b= c SUPRA d= 2 SUPRA 1, a x b x c x d=900

Answer 1

a) ad=cd deci bc supra ad=1 avem : 15+1=16 b) ad=bc 2d=c 2b=a ac=2d×2b axbxcxd=900 deci ac=900:bd 4bd=900:bd bdxbd=225 bd=15. deci ab=900:15=60