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OpenStudy (anonymous):
Let x > -1 and n being a natural number Proove: (1+x)^n ≥ 1+nx
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OpenStudy (anonymous):
Using induction
myininaya (myininaya):
n =1 we have (1+x)^1=x+1=1+x lets assume it is true for some k>=1 so we have (1+x)^k>=1+kx we need to show it is true for k+1 (1+x)^(k+1)=(1+x)^k*(x+1)>=(1+kx)*(x+1)>=x+1+kx^2+kx=x(k+1)+1+kx^2<=x(k+1)+1=1+(k+1)x
myininaya (myininaya):
any question?
OpenStudy (anonymous):
Thank you so much :) :) :)
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