The given sequence is an A.P. in which first term (a=20) and common difference (d=−34).
⟹83<3n⟹3n>83⟹n>2723⟹n≥28[∵n is a natural number]Thus 28th term of the given sequence is the first negative term.
Which term of the sequence 20,1914,1812,1734......is the negative term?