a ) Khi \(f\left(2\right)\)
\(5.2+1-\left|5.2-3\right|\)
\(=10+1-\left|10-3\right|\)
\(=10+1-7\)
\(=4\)
Khi \(f\left(-7\right)\)
\(5.\left(-7\right)+1-\left|2.\left(-7\right)-3\right|\)
\(=-35+1-\left|-14-3\right|\)
\(=-34-\left|-17\right|\)
\(=-34-17\)
\(=-51\)
b ) Khi \(f\left(2\right)\) , thì :
\(5.2+1-2.2-3\)
\(=10+1-4-3\)
\(=4\)
Khi \(f\left(-7\right)\) , thì :
\(5.\left(-7\right)+1-2.\left(-7\right)-3\)
\(=-35+1+14-3\)
.\(=-23\)
\(a.\)
Ta có : \(y=f\left(x\right)=5x+1-\left|2x-3\right|\)
\(\Rightarrow f\left(2\right)=5.\left(2\right)+1-\left|2.\left(2\right)-3\right|=10\)
\(\Rightarrow f\left(x\right)=5.\left(-7\right)+1-\left|2.\left(-7\right)-3\right|=-51\)
\(b.\)
Ta có : \(y=f\left(x\right)=5x+1-2x-3\)
\(\Rightarrow f\left(2\right)=5.\left(2\right)+1-2.\left(2\right)-3=4\)
\(f\left(-7\right)=5.\left(-7\right)+1-2.\left(-7\right)-3=-23\)
