Cac bai toan chung minh bat dang thuc

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b = 0, c=0

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abc

+

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=

roti

ab-i-bgg-ra-3ca-zb-p.gl

=

Coin 16
tank

theo otium

gia

be

Coin 17

b, 40 CMR
8 (at b. + c) Cab + be
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.

+

) £9 (at b)( b + c) Cct a)

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him he? trott fat btcka-b-ibc-cal-ca-bkb-cxc-ai-a.be
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kit

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qua

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Coin 18

11T

8K

8k -18 y s

=

7

8 Abc
-1k

YE

→

=

9k

=

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UP

t-y-y-z-z-x-1.ma-P-EY-z-IAinphu.nghi.ch
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ữ ữ
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+

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P

9C ,

y>0

VEY

3

,

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7¥
dip tgia thié't

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+

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7

→

min

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ray

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giariing

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set 62+25
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doin Bunhia

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1

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23

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y>
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,

ab =L

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a

+

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fi

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K

,

y , 2- 70 ,

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Viet lai P

+

K +

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y

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x +

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=

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help

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mủ

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can

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co si
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27

a,

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a

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c

=

coin

>

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:

.

(

'

227

lñmotep

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x

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a

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24

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(4-4%42)

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( a' + it 14114-8+14

=

7

coin

a

row

+

btc =3
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72

so

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nail xz3

30

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wing

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£1

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[ T.agiaisiicebza.be

wing loin hint

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has

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:

a, b.

1+aib

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=

z

PZ 31
=

3

a4b

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a- b' +24464+4
3 ( a-+ b' +

1)

( c- + 2) → Bunhia
( at -162+1742+14 CY 7 3. ( Atb -142=27
a'+ b' +e)

Coin 28

Cath

a ,b

1

>0

Sit

.

a +b

,

dung