exponents

exponents

Postby DeValera » Thu May 21, 2020 10:19 am

2^2 + 2^2 = 8 or is it
2^2 + 2^2 =4^2 (which would be 16)
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Re: exponents

Postby Guest » Thu May 21, 2020 11:38 am

[tex]a^n \times a^m = a^{n+m}[/tex]

[tex]a^n + a^m =[/tex] there are no such a formula

But if we have [tex]m > n[/tex] we can write
[tex]a^n + a^m = a^n(1 + a^{m-n})[/tex]


In your case you have
[tex]a + a =2a[/tex] where [tex]a = 2^2[/tex]
So
[tex]2^2+2^2 = 2\cdot 2^2=2\cdot 4[/tex]
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Re: exponents

Postby Guest » Sun May 24, 2020 2:14 pm

Or for this particular case [tex]2^2+ 2^2= 4+ 4= 8[/tex].

If it were "*" rather than "+" then it would be [tex]2^2*2^2= 4*4= 16[/tex].

Be careful what your operation is!
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