nsmuni
differentiate 1 over 2^t
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DJVJ
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what? how can I do that.....
there all part of one fraction
nsmuni
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the answer is -2^(-t) ln 2. but i want to know how to get that answer?
DJVJ
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I don't really understand about that..
03225186213
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first take log
log 2^-t= -t (ln2)
03225186213
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wwhats on other side
?
sha0403
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it same when we differentiate the exponent.. for example: e^-x
solution: e^-x.-1.ln e = e^x...
for this problem u should be let exponent to be 2..
so the solution:
2^-t.-1.ln 2 =-2^-t ln 2
sha0403
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did u get it?
nsmuni
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not so.. pls explain further tq..
DJVJ
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Ahh...I know it...thank you @sha0403
nsmuni
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how there is ln 2? and not ln 2^t?
sha0403
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because it known as formula.. have u see my solution of the exponent? we must let e to be 2 in 2^-t
nsmuni
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ohh yes. now i can recall back. TQVM sha :)
sha0403
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welcome :)