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Mathematics 20 Online
OpenStudy (anonymous):

please help me will fan and medal ;-;

OpenStudy (anonymous):

whats

OpenStudy (anonymous):

OpenStudy (anonymous):

C

OpenStudy (anonymous):

explain ? i need the correct asnwer

OpenStudy (anonymous):

sorry D

OpenStudy (anonymous):

i had put b as my answer

OpenStudy (anonymous):

can u explain please ?

OpenStudy (anonymous):

Actually it is B

OpenStudy (anonymous):

.....

OpenStudy (anonymous):

@welshfella

OpenStudy (welshfella):

Hint: (y^4)^4 = y^(4*4) = x^16

OpenStudy (welshfella):

look at the y^4 in first expression and second

OpenStudy (welshfella):

y^4 is changed to y^8 is that correct? remember that the 4 outside the large bracket in first expression takes everything inside to power 4

OpenStudy (anonymous):

yes it is correct

OpenStudy (welshfella):

- you should multiply the exponents by 4 - not add 4

OpenStudy (anonymous):

Oh ok so thats not correct

OpenStudy (welshfella):

what is correct?

OpenStudy (anonymous):

since its an exponent

OpenStudy (welshfella):

(y^4)^4 = y^16 NOT y^8

OpenStudy (anonymous):

yes thats what i meant haha

OpenStudy (welshfella):

and so which step is wrong?

OpenStudy (anonymous):

the y^4 to y^8 is wrong

OpenStudy (welshfella):

right - and which step is that in?

OpenStudy (anonymous):

1 ?

OpenStudy (welshfella):

right

OpenStudy (welshfella):

4 is added to all the exponents in step 1 instead of multiplying by 4

OpenStudy (anonymous):

oh so the answer is a ?

OpenStudy (welshfella):

yes

OpenStudy (anonymous):

haha yes i get it now thansk so much once again :D

OpenStudy (welshfella):

yw

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