send answer for all these questions plz
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1. if f(x)=3x+5, then
f(-1)= 3×-1+5
= -3+5=2
and f(5)=3×5+5
=15+5=20
now, f(-1)-f(5)=2-20
=-18
preeth3:
hey i dont know how to solve so sorry
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