Ok I Get everything up until the point where it says. k $\sqrt{k+1}$ + $\sqrt{k+1}$ = (k+1) $\sqrt{k+1}$ How in the world did they get there? Or am I missing something else
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Just factor out a $\sqrt{k+1}$ from the left hand side. This yields $(k+1)\sqrt{k+1}$ which is what they claim.
Randall
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1Wow. Can't believe I didn't see that, thanks. – Dani Jo Apr 21 '19 at 02:51
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1Happens to all of us. – Randall Apr 21 '19 at 02:51