Question

3x7x7x7x7 in index notation 2x9x9x9x2x9plz helpthx

Answer 1

$3 \times {7}^{4}$
Because there's one 3 & four 7's .

${2}^{2} \times {9}^{4}$
Because there are two 2's & four 9's

Answer 2

Answer:

1) $3\times 7\times 7\times 7\times 7=3\times 7^4$

2) $2\times 9\times 9\times 9\times 2\times 9=2^2\times 9^4$    

Step-by-step explanation:

Given : Numbers

1) $3\times 7\times 7\times 7\times 7$

2) $2\times 9\times 9\times 9\times 2\times 9$

To find : Write the numbers into index notation?

Solution :

Index notation is defined as the shortcut method of writing repeated multiplications by the same number.

Now, The index notation of the given number is

1) $3\times 7\times 7\times 7\times 7$

3 repeat 1 time and 7 repeat 4 times.

Index notation is $3\times 7\times 7\times 7\times 7=3\times 7^4$

2) $2\times 9\times 9\times 9\times 2\times 9$

2 repeat 2 times and 9 repeat 4 times.

Index notation is $2\times 9\times 9\times 9\times 2\times 9=2^2\times 9^4$