1) ln(1/sqrt(1+x^2)) +1=0 ??? 2) e^x=1+2e^-x for this one I've got e^(x)-2e=1, then e(x-2)=1. I'm just unsure of where to go from here?
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Originally Posted by Chinnie15 1) ln(1/sqrt(1+x^2)) +1=0 ??? 2) e^x=1+2e^-x for this one I've got e^(x)-2e=1, then e(x-2)=1. I'm just unsure of where to go from here? 1) change to an exponential equation ... solve for 2) multiply every term by ... factor the quadratic and solve for
how come you multiply every term by e^x? I don't see that.
Originally Posted by Chinnie15 how come you multiply every term by e^x? I don't see that. well, now you've seen it ... I wanted to get rid of the in the equation. it's like if you had the equation ... you'd multiply every term by to clear the unwanted fraction. ... and it makes the equation quadratic in , which can be easily factored and solved.
ok, I see it now. thank you!
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