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calculus

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1. if f(x)=3^x-3^-x, find :f(2),f(-1)
2. if y1=x^2+3x-1 and y2=x-5,
find: a. y1+y2
b. y1-y2
c. y1(y2)

please show solution thanks.

  • calculus -

    f(2)=80/9
    f(-1)=-8/3

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