C1 Maths Edexcel Help

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Size:  21.6 KBI'm a little confused on how to go about answering part (a) of question 3, is it logs - because I never did logs at GCSE and I didn't think logs was even in C1. Thanks!
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    (Original post by jessnoch)
    Name:  Screen Shot 2016-10-06 at 16.29.28.png
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Size:  21.6 KBI'm a little confused on how to go about answering part (a) of question 3, is it logs - because I never did logs at GCSE and I didn't think logs was even in C1. Thanks!

    well it is logs, however the basic rule is to achieve the same base. in this you see you can convert the 9 into 3^2 then multiply the power with the y-1 giving you 2y-2, then the 3 on both sides cancel leaving x = 2y-2
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    (Original post by mahmzo)
    well it is logs, however the basic rule is to achieve the same base. in this you see you can convert the 9 into 3^2 then multiply the power with the y-1 giving you 2y-2, then the 3 on both sides cancel leaving x = 2y-2
    Thanks so much! can you help me with part (b) too?
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    (Original post by jessnoch)
    Thanks so much! can you help me with part (b) too?
    substitute the 1st equation into the second, youll form a quadratic (After rearranging / expanding), then factorisation will give you 2 values of y.

    Sub these values into equation 1 to find the matching x values
 
 
 
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