I Tavi

I
Tavi
50
K
y = x 2
A B
–3 –2 –1
K
23 1-el naxazze mocemul y = x 2 funqciis grafikze aRebuli
A, B, da O wertilebi tolgverda samkuTxedis wveroebia.
ipoveT A da B wertilebis koordinatebi, Tu A da B
simetriuli wertilebia y RerZis mimarT da O(0;0).
24 wrfes, romelic gadis 1) A(3;0), 2) A(0;4) wertilze,
y = x 2 parabolasTan aqvs erTi saerTo wertili. ipoveT:
a) am wrfis daxris koeficienti;
b) wrfisa da parabolis saerTo wertilis koordinatebi.
25 students gamocdis Casabareblad unda gaemeorebina wignis 360
gverdi. avadmyofobis gamo pirvel sam dRes man ver SeZlo mecadineoba
da amitom darCenili dReebis ganmavlobaSi igi yoveldRiurad
imeorebda 20 gverdiT mets, vidre dagegmili hqonda. ramden dReSi
gaimeora studentma sagani?
26 wiladis mricxveli 11-iT metia mniSvnelze. Tu am wiladis mricxvels
davumatebT 5-s, xolo mniSvnels ki – 12-s, miviRebT wilads, romelic
samjer naklebi iqneba mocemul wiladze. ipoveT Tavdapirveli
wiladi.
27 katerma 12km mdinaris dinebis sawinaaRmdego mimarTulebiT da 5km
mdinaris dinebis mimarTulebiT gaiara imave droSi, rac mas tbaze
18km-is gasavlelad dasWirdeboda. ipoveT kateris sakuTari siCqare,
Tu mdinaris dinebis siCqare 3km/sT-ia.
28 SeadgineT geometriuli Sinaarsis amocana, romelic amoixsneba Semdegi
gantolebis saSualebiT:
M
0 1 2 3
nax. 1
a) x(x – 2) = 36; b) (x – 2)(x + 2) = 12.
B C
A D
M
B C
A D
29. marTkuTxedis formis muyaos furclisgan,
romlis sigrZe 1,5-jer metia
siganeze, unda daamzadon TavRia
yuTi, amisTvis muyaos furcels
kuTxeebSi 8sm sigrZis gverdis mqone
kvadratebi amoaWres. ipoveT Tavdapirveli
muyaos furclis sigrZe
da sigane, Tu dasamzadebeli yuTis
moculoba 6080 sm 3 unda iyos.