Question

Tentukan FPB dan KPK dari
a.21 dan 9
b.9 dan 36
c.8 dan 24
d.10 dan 20
e.16 dan 20

tolong jawab secepatnya please.....

Answer 1

A) 21 = 3 × 7
9 = 3²
FPB = 3
KPK = 3² × 7 = 63

b) 9 = 3²
36 = 2² × 3²
FPB = 3² = 9
KPK = 2² × 3² = 36

c) 8 = 2³
24 = 2³ × 3
FPB = 2³ = 8
KPK = 2³ × 3 = 24

d) 10 = 2 × 5
20 = 2² × 5
FPB = 2 × 5 = 10
KPK = 2² × 5 = 20

e) 16 = 2⁴
20 = 2² × 5
FPB = 2² = 4
KPK = 2⁴ × 5 = 80

Answer 2

A :
21 = 3 × 7
9 = 3²

FPB = 3

KPK = 3² × 7
KPK = 9 × 7
KPK = 63
~~~~~~~~~~~~~
b :
9 = 3²
36 = 2² × 3²

FPB = 3²
FPB = 9

KPK = 3² × 2²
KPK = 9 × 4
KPK = 36
~~~~~~~~~~~~~
c :
8 = 2³
24 = 2³ × 3

FPB = 2³
FPB = 8

KPK = 2³ × 3
KPK = 8 × 3
KPK = 24
~~~~~~~~~~~~~
d : 
10 = 2 × 5
20 = 2² × 5

FPB = 2 × 5
FPB = 10

KPK = 2² × 5
KPK = 4 × 5
KPK = 20
~~~~~~~~~~~~~
e :
16 = 2⁴
20 = 2² × 5

FPB=2²
FPB= 4

KPK = 2⁴ × 5
KPK = 16 × 5
KPK = 80