Show that a1,a2,a3...an, form an A.P. whose nth terms is
an = 9 - 5n. Also find the 15th terms.
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Answer:
an=9-5n
a1=9-5×1=4
a2=9-5×2=-1
a3=9-5×3=-6
a15=9-5×15=-66
Step-by-step explanation:
as to find A1,A2,A3, put value 1,2,3 in given equation as this forms an ap ,so to find a15 put 15 in that equation
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