the value of minus 2 by 3 to the whole power minus 4 is what
Answers
Answer:
Step-by-step explanation:
• Exponents are used to express large numbers in shorter form to
make them easy to read, understand, compare and operate upon.
• a × a × a × a = a4 (read as ‘a’ raised to the exponent 4 or the fourth
power of a), where ‘a’ is the base and 4 is the exponent and a4 is
called the exponential form. a × a × a × a is called the expanded
form.
• For any non-zero integers ‘a’ and ‘b’ and whole numbers m and n,
(i) am × an = am+n
(ii) am ÷ an = am–n , m>n
(iii) (am)
n = amn
(iv) am × bm = (ab)
m
(v) am ÷ bm =
m
a
b
(vi) a0 = 1
(vii) (–1)even number = 1
(viii) (–1)odd number = –1
• Any number can be expressed as a decimal number between 1.0
and 10.0 (including 1.0) multiplied by a power of 10. Such form of a
number is called its standard form or scientific notation.
15-04-2018
In Examples 1 to 3, there are four options, out of which one is correct.
Write the correct one.
Example 1: Out of the following, the number which is not equal to
– 8
27 is
(a) –
3
2
3
(b)
3
2
3
−
(c) –
3
2
3
−
(d)
222
333
−−− × ×
Solution: Correct answer is (c).
Example 2: ()() 5 3
− ×− 7 7 is equal to
(a) ( )8
−7 (b) – ( )8
7 (c) ( )15
−7 (d) ( )2
−7
Solution: Correct answer is (a).
Example 3: For any two non-zero integers x any y, x3 ÷ y3 is equal to
(a)
0
æ ö
ç ÷ è ø
x
y (b)
3
x
y
(c)
6
æ ö
ç ÷ è ø
x
y (d)
9
æ ö
ç ÷ è ø
x
y
Solution: Correct answer is (b).
In Examples 4 and 5, fill in the blanks to make the statements true.
Example 4: ( )
2 7 6 5 5÷ = ________
Solution: 52
Answer:
the answer is 81 upon 16 or may be -81/16
1/(-2/3)^-4 = 3/2^4