43
d) mocemulis tolfasi utolobaa:
2x+3
x(2x–3)>0.
pasuxi:
(
– 32; 0
)
∪
(
32; +∞
)
.
29
a) x
2
x
2
+1 ≥0 utoloba sruldeba nebismieri x-sTvis,
b)
x
2
+1
x
2
≥0 utoloba sruldeba nebis mi eri x≠0-sTvis,
g) (
x–5)(
x+5)
x(
x–3)(
x+3)≥0
pasuxi:
x∈ [–5; –3)∪(0; 3)∪[5; +∞).
d) x
2
+25
x(
x
2
–9) ≥0 utoloba tolfasia x(x–3)(x+3)>0 utolobis.
pasuxi:
(–3;0)∪(3; +∞)
30
a) (x–2)(x+2)
x(
x–3)
2
≥0
pasuxi:
[–2; 0)∪[2; 3)∪(3;+ ∞)
b) (3x–1)
2
(2x–1)(2x+1)
x(
x
2
+4)
≥0 utoloba tolfa-
sia (3x–1)
2
(2x–1)(2x+1)
x
≥0 utolobis, radgan
x
2
+4>0 utoloba sruldeba nebismieri x-sTvis.
pasuxi:
[
-12; 0
)
∪
{
13
}
∪
[
12; +∞
)
.
g) x
2
(1–x)(x+10)>0 utoloba amovxsnaT in-
tervalTa meTodiT:
pasuxi: (–10; 0)∪(0;1).
d) x
2
(x+3)(x+4)
–2,5(
x–3)(2
x–3)≥0
pasuxi: [–4; –3]∪{0}∪
(
32; 3
)
.
31
a) x(x–
√
5 )(x+
√
5 )
x(
x
2
+5)
≤
0, saidanac (x–
√
5 )(x+
√
5 )≤0, x≠0
pasuxi: [–
√
5 ; 0)∪(0;
√
5 ].
b)
x(
x
2
–3)(x+1)
x(
x–1) >0,
x(x–
√
3 )(x+
√
3 )(x+1)
x(
x–1)
>0.
pasuxi: (–
√
3 ;–1)∪(0;1)∪(
√
3 ; +∞).
g) (
x–
√
10)(x+
√
10)
x–π
≥
0
pasuxi: [–
√
10; π)∪[
√
10; +∞)
44
d) x(x–
√
10)(x+
√
10)
(
x+4)(
x–3)
≥
0
pasuxi: (–4; –
√
10]∪[0;3)∪[
√
10; +∞).
32
wylis avzis zomebi aRvniSnoT x, x+5 da x+10-iT. misi moculoba meti unda
iyos x + 5
2 gverdis mqone kubis moculobaze:
x(
x+5)(
x+10)
>
(
x + 5
2
)
3
,
x(
x+10)
> x
2
+10x+25
8
,
8
x
2
+80x>x
2
+10x+25, 7x
2
+70x–25>0, x
1
≈
–10,35, x
2
≈
0,345.
saidanac miaxloebiT
x<–10,35 an
x>0,345.
virCevT x-is mniSvnelobebs (x
2
;+∞) Sualedidan. amrigad, pirobaSi miTiTebuli
saxis avzis fuZis mcire
x gverdi SeiZleba iyos nebismier ricxvi (0,345; +∞)
Sualedidan (miaxloebiT). fuZis meore gverdi da simaRle Sesabamisad gamoiTvleba.
pasuxi:
x,
x+5
,
x+10,
x∈(0,345
;+ ∞).
33
Tu konteineris simaRles aRvniSnavT x-iT, maSin misi fuZis gverdebi iqneba
x+2 da
x+6. pirobis Tanaxmad, kubis formis konteineris wiboa
x da
x
3
<8x(x+2)(x+6).
x dadebiTi ricxvia, amitom vRebulobT
x
2
<8(x
2
+8x+12), 7x
2
+64x+96>0,
x
1
≈
–7,26
, x
2
≈
–1,89.
saidanac miaxloebiT
x∈(–∞; –7,2)∪(–1,89; +∞). nebismieri dadebiTi
x ricxvi am simravles ekuTvnis.
amrigad, moculoba nebismieri kubis, romelsac pirobaSi aRniSnuli forma aqvs,
metia mocemuli paralelepipedis moculobaze 8-jer mainc.
jgufuri muSaoba
Tema:
utolobis amoxsna sxvadasxva xerxiT.
jgufebs vurigebT amocanebs d ganvumartavT, rom naSromTa Sefaseba miT maRali
iqneba, rac ufro meti xerxiT amoixsneba amocanebi.
amoxsnis yoveli damatebiTi xerxis warmodgenisTvis jgufi daimsaxurebs dam-
atebiT qulebs. savarjiSoebi SeiZleba SeirCes jgufebis akademiuri donis gaTval-
iswinebiT.
am amocanebze muSaobis procesSi moswavleebi eCvevian: erTsa da imave sakiTxze
sxvadasxva mosazrebis gamoTqmas, sakuTari poziciis dacvas, xolo saTanado kontrma-
galiTebis gacnobisas _ poziciis Secvlas; msjelobis sajaro warmarTvas, jgufur
muSaobas. maT uviTardebaT analizisa da sinTezis unari. es rTuli saazrovno da
ganmaviTarebeli procesia.
a) amovxsnaT |x|>3 utoloba modulis Tvisebebis gamoyenebiT. ganvixiloT ori
SemTxveva:
Tu x≥0, maSin x>3;
Tu x<0, maSin –x>3, anu x<–3.
miviReT, x>3 an x<–3.