<p>Guys I found this problem in Grubber's and I hadn't found any similar questions before. Is it EASY on SAT or is it a hard One? I'm just wondering.</p>
<p>If f(x) = a^x ,then
A) f(x+y)=f(x)+f(y)
B) F(x+y) = f(x)f(y)
C)f(x-y) = f(x) - f(y)
D) f(xy) = f(x)f(y)
E) f(x/y) = f(x)/f(y)</p>
<p>The answer is B. Basically, you can just plug and numbers or be very good with your knowledge of exponents. For this, you need to know that (a^x)(a^y) = a^(x+y).</p>
<p>Based off of my experience with the SAT, I'd say this problem is a harder medium question.</p>
<p>i agree with latency</p>
<p>I know that it's B). It's easy for me but is it considered as easy question?</p>
<p>how do you solve this?? I get the law of exponents same base multiply each other=add the exponents but how does that relate to the problem.. in terms of functions of f(x)</p>
<p>that's the way the problem should be solved. there's no difference when you have f(x);
f(x+y)=f^(x+y)=a^x . a^y = f(x).f(y)</p>