the 6th term of an arithmetic sequence is 14 and it's 14th term is 6.what is the algebraic expression for this sequence
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Answer:
xn= -n+20
Step-by-step explanation:
x6= 14
x14 = 6
d= (14-6)÷(6-14)
= 10÷(-10)
= -1
xn = dn+ f-d
f = x6-5d
= 14- 5×(-1)= 14+5 = 19
xn= -1n+19-(-1)
= -n+20
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