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# C1 Maths Edexcel Help Watch

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1. I'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!
2. (Original post by jessnoch)
I'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
3. (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?
4. (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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