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# maths watch

1. if Un+1 = 2Un-4 and U1=5 what is U3
2. (Original post by jesst2703)
if Un+1 = 2Un-4 and U1=5 what is U3
Sub the value for u1 in to find u2, sub the value for u2 in to find u3.

if n=1 un = u1, and un+1 = u2
3. (Original post by voldo)
Sub the value for u1 in to find u2, sub the value for u2 in to find u3.

lol??

if n=1 un = u1, and un+1 = u2
Thanks

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Updated: June 18, 2017
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