The value 5 is an upper bound for the zeros of the function shown below f(x)=x^4+x^3-11-9x+18

i think is g(1)=-1.

hope that i can

not only in mathematics, scientific proof also are required in the other field of science. also maths proofs are of particular structure, containing steps and logics. so proving is like doing science, it is science. that's why it is important to prove. 

an inaccurate proof leads to errors, or stating results that are not accurate.  which wil mess the probelm up you dont want this

yes.. it's proven to be 36.