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Reiškiniai su laipsniais

Authored by Kamilė Sinkevičiūtė

Mathematics

10th Grade

Used 5+ times

Reiškiniai su laipsniais
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8 questions

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1.

MULTIPLE CHOICE QUESTION

20 sec • 1 pt

Suprastinkite reiškinį

x3 · x5 · x-2

x10

x-30

x6

x8

Answer explanation

Turime daugybą, taigi sudedame laipsnius:

3 + 5 + (-2) = 6

2.

MULTIPLE CHOICE QUESTION

20 sec • 1 pt

Ką gausime, suprastinę (2xy)3 + 20

2xy3 + 2

8x3y3

6x3y3 + 1

8x3y3 + 1

Answer explanation

Laipsniu pakeliame kiekvieną narį skliaustuose (2xy)3 = 23 x3 y3

O 20 = 1, pagal taisyklę

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Atskliauskite ir pakelkite laipsniu

( 641/2 )3

32

128

16

512

Answer explanation

Iš pradžių 64 pakeliame 1/2 ir gauname 8. Tada 8 keliame kubu ir gauname 512

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Suprastinkite

(2x3y)2 · (4x-1y3)

8x5y5

16x5y5

16x4y5

8x4y5

Answer explanation

Kiekvieną narį sudauginkime atskirai:

22 · 4 = 16

(x3)2 · x-1 = x6 · x-1 = x5

y2 · y3 = y5

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Suprastinkite

(a5b3) ÷ (a2b)

a3b2

a7b4

a3b

a2b2

Answer explanation

a5 ÷ a2 = a3

b3 ÷ b = b2

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Kuri iš nurodytų išraiškų yra lygi a-3 ?

1 / a3

a0 · a-3

a2 / a5

Visi atsakymai teisingi

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Suprastinkite

( x2 · y -3 )-2

x-4 / y6

x4 / y6

x4 · y6

y6 / x4

Answer explanation

(x2)-2 = x-4 = 1/x4

(y-3 )-2 = y6

y6 · 1/x4 = y6/x4

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