December 2018 1 27 Report
Tolongin dong..
1. Jika f(x) = 1/2(a^x + a^-x) dan g(x) = 1/2(a^x - a^-x), maka f(x)*f(y) + g(x)*g(y) sama dengan
A. f(x+y)
B. g(x+y)
C. f(x-y)
D. g(x-y)
E. f(2x)

2. Jika x^1/2 + x^-1/2 = 2, maka x^3/2 + x^-3/2 sama dengan
A. -4
B. -2
C. 0
D. 2
E. 4
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