1) 2+2+2+2 can be written as .......... *
2 points
2⁴
2 x 4
2+4
None of the above
2) What is the index in the given number? *
2 points

2
8
4
None of the above
3) 5¹ = ? *
2 points
1
5
0
51
4) Find the value of 2³. *
2 points
2
3
6
8
5) 3² is read as________? *
2 points
3cube
2cube
3square
2square
6) 2³ x 2⁴ =? *
2 points
2¹
2 raised to 7
7 raised to 2
None of the above
7) 2⁴ ÷ 2³ =? *
2 points
2 raised to 7
2 raised to 1
0
1
8) (5/3) raised to -1=? *5/3
3/5
0
1
9) 5/3 is ............ of 3/5. *
2 points
multiplicative inverse
additive inverse
Inverse
none of the above
10) (-1) raised to m = 1,then m is a/an ______number. *
2 points
even
odd
prime
none of the above
Answers
Answer:
Step-by-step explanation:
We can start and end the summation at any value of nnn. For example, this sum takes integer values of nnn from 444 to 666:
\begin{aligned} &\phantom{=}\displaystyle\sum_{\goldD n=4}^6 \goldD n-1 \\\\ &=\underbrace{(\goldD 4-1)}_{\goldD{n=4}}+\underbrace{(\goldD 5-1)}_{\goldD{n=5}}+\underbrace{(\goldD 6-1)}_{\goldD{n=6}} \\\\ &=3+4+5 \\\\ &=12 \end{aligned}
=
n=4
∑
6
n−1
=
n=4
(4−1)
+
n=5
(5−1)
+
n=6
(6−1)
=3+4+5
=12
We can use any letter we want for our index. For example, this expression has iii for its index:
\begin{aligned} &\phantom{=}\displaystyle\sum_{\goldD i=0}^2 3\goldD i-5 \\\\ &=\underbrace{[3(\goldD 0)\!-\!5]}_{\goldD{i=0}}+\underbrace{[3(\goldD 1)\!-\!5]}_{\goldD{i=1}}+\underbrace{[3(\goldD 2)\!-\!5]}_{\goldD{i=2}} \\\\ &=-5+(-2)+1 \\\\ &=-6 \end{aligned}
=
i=0
∑
2
3i−5
=
i=0
[3(0)−5]
+
i=1
[3(1)−5]
+
i=2
[3(2)−5]
=−5+(−2)+1
=−6
Answer:
Option d)2x4
Step-by-step explanation:
2+2+2+2 can also be considered as 2 added 4 times which is the key concept of multiplication