
#1
Feb1512, 01:20 PM

P: 79

This is a really basic problem and I just need some review.
How do I add 2^{k+1} + 2^{k+1}? This is where I am stuck 2^{1}2^{k}+2^{1}2^{k} 



#2
Feb1512, 01:24 PM

HW Helper
P: 1,347

Think of it this way. Can you add
x + x? y + y? something + something? This is what the expression 2^{k+1} + 2^{k+1} merely is. Once you get that, then you can use the appropriate property of exponents. 



#3
Feb1512, 01:53 PM

P: 79

2*2^{k+1} = 2^{k+2} and just another one for fun 2^{k+1}+2^{k+1}+2^{k+1}+2^{k+1} = 4*2^{k+1 } = 2*2*2^{k+1} = 2^{k+3} Does this seem correct? 



#4
Feb1512, 02:05 PM

Mentor
P: 21,012

Adding exponents 



#5
Feb1512, 02:12 PM

P: 79

Cool thanks !



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