
Reiškiniai su laipsniais
Authored by Kamilė Sinkevičiūtė
Mathematics
10th Grade
Used 5+ times

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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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