Question

Which expression is equivalent to (7^3)^-2?

1/7 x 7 x 7 x 7 x 7 x 7

7

1/6 x 6 x 6 x 6 x 6 x 6 x 6

1/7

Answer 1

@SolomonZelman @AnyTipzWouldHelp

Answer 2

\(\Huge\color{red}{ \rm (7^3)^{-2}=\frac{1 }{(7^3)^{2}} =\frac{1 }{7^{(3 \times 3)}} =? }\)

Answer 3

Dangit solomon, you type to fast. lol

Answer 4

Is it A?

Answer 5

I'll let him explain it, i'm on a couple other question right now, i can't sorry.

Answer 6

@SolomonZelman : That's incorrect - (7^3)^2 ≠ 7^(3x3).

Answer 7

it is none of your options, unfortunately.

Answer 8

Hint: (a^b)^c = a^(bc)

Answer 9

o: 2 Math Geeks fighting!! A NEVER BEFORE SEEN MOMENT!!!!!

Answer 10

Isn't it 7^(3x2)?

Answer 11

shiraz, you are confusing

\[\Huge a^{b^c}≠a^{b+c}\]

Answer 12

I am relevantly bad at math, but this I do know .

Answer 13

My bad

Answer 14

it's 3 times 2...

Answer 15

the exponent I mean... ; sorry.

Answer 16

Okay, then it's A. Thanks

Answer 17

@SolomonZelman : Yes, your last post is correct. Indices work differently from normal mathematical operators. Some laws which you need to know are as follows:

1. a^b * a^c = a^(b+c)
2. (a^b)^c = a^(bc)
3. a^(b^c) = (a^b)^c

Answer 18

also @yellowlegoguy99 if your ever stuck in math, it's valuable to learn back roads to getting answers. If you have a calculator, just solve (7^3)^-2 on your calculator, then for each possible answer, work them out, so for A for instance, multiply 7 all those times, then divide by 1... you get the same answer, and therefore, you can induce that A is the right answer.

Answer 19

That's what I did lol

Answer 20

yes, shiraz I know the laws, I just really messed up on this one. dky .

Answer 21

It happens to everyone, no sweat.

Answer 22

@SolomonZelman : No worries - we all make mistakes at times - take care.

Answer 23

:)

Answer 24

My typo for Law #3 - I meant to type:

a^b^c = a^(b^c)

Sorry for the typo.