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Mathematics
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OpenStudy (anonymous):
please help me will fan and medal ;-;
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OpenStudy (anonymous):
whats
OpenStudy (anonymous):
OpenStudy (anonymous):
C
OpenStudy (anonymous):
explain ? i need the correct asnwer
OpenStudy (anonymous):
sorry D
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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
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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
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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
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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
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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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