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# this must be simple !!?! Watch

1. find y when

2^y= 4*2^0.5

i can do this by logarithms however i would like to know how to do it without using logarithms as it is a C1 question
2. (Original post by Byrney11)
find y when

2^y= 4*2^0.5

i can do this by logarithms however i would like to know how to do it without using logarithms as it is a C1 question
Simplify the RHS into one power (remember that 4 = 2^2).
3. (Original post by Byrney11)
find y when

2^y= 4*2^0.5

i can do this by logarithms however i would like to know how to do it without using logarithms as it is a C1 question
write it all out in the same bases

so

so y=

i think thats right, hopefully
4. cheers for that.....

what happens with this one then

4^x= 8^2-x
5. (Original post by Byrney11)
cheers for that.....

what happens with this one then

4^x= 8^2-x
simplify the powers

Then =

and solve that liner equation to find x

EDIT: sorry about my latex, first time using it

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