English, asked by anuthanishka01, 3 months ago

find x si that (-7) power x+2 *(-7) power 5 =(-7) power 10

Answers

Answered by Amatullahdhar
0

Answer:

c

Explanation:

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



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