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Could someone please explain this maths question? (AS, C1)

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    Given that y=2x, express 22x and 22+x in terms of y.

    I got 22x = y2, but I don't know what to do for the second one :cry:
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    Anyone...?
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    indice rules
     a^m \times a^n = a^{m+n}
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    Well 22+x is the same as 22 × 2x which is equal to 4 × y = 4y.
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    Yeah agreed with asinghj, look at that rule and you will get it
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    (Original post by pfate)
    Well 22+x is the same as 22 × 2x which is equal to 4 × y = 4y.
    Thank you for providing the steps! :^_^:
 
 
 
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