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4^x - 2^x+1 - 15 = 0

x = log5/log2

Answered by Narhen E. • Maths tutor

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I always mix up my integration and differentiation. How do i stop this?

2^-8 = ?

Show that r^2(r + 1)^2 - r^2(r - 1)^2 ≡ 4r^3.

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