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OpenStudy (anonymous):
Please Help! Find the following sum: 1+2+4+8+...+2^k-1
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geerky42 (geerky42):
What do you know so far?
geerky42 (geerky42):
kind of hard to help you without knowing what you learned recently
OpenStudy (anonymous):
I learned about The and A Fibonacci sequence
OpenStudy (shamim):
Is it a geometric series?
OpenStudy (shamim):
Use Sum=a(1-r^n)/(1-r)
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OpenStudy (shamim):
a=first term of ur given series r=comon ratio n= number of term
OpenStudy (shamim):
Sum=?
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