Any maths buffs?

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crow

A friend sent me this and I’m wondering if anyone here can help. I don’t think it’s possible but would appreciate confirmation!

If x = (1 - vn)/ä

where:

v = 1/(1 + i)

and

ä = ln(1 + i)

Is there a way to write a formula for i in terms of n and x?

Edit: just can’t see a way to free the i from the ln without locking the other up with an e…

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Drakien in reply to @crow

I've been banging my head against this for a while. I don't think there is, as i, n and x are all dependent. Wolfram Alpha helped a bit:

https://www.wolframalpha.com/input?i=x+%3D+%281+-+vn%29%2Fa%2C+v%3D1%2F%281%2Bi%29%2C+a%3Dln%281%2Bi%29+&assumption=%22i%22+-%3E+%22Variable%22

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crow in reply to @Drakien

Cheers - that is useful. Should have thought of wolfram alpha.

I’m so used to doing stuff that I know has a solution it felt weird not knowing for sure if I was on the right track. Thankfully, I agree with WAs real solution so I’m happy with that!

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