If the 3rd and 11th term of an arithmetic sequence are -6 and 10 respectively which term of this sequence is Zero
Answers
Answered by
2
Answer:
Xn = a + d(n-1)
10= a + d(9)
0 = a + d(4)
------------- subtract
10 = 5 d
d = 2
a = -8
so
X20 = -8 + 2*19 = 30
Answered by
0
Answer:
6th term
Step-by-step explanation:
a+2d = -6
a+10d = 10
solving this gives d = 2 and a = -10
-10
-8
-6
-4
-2
0
0 is the 6th term
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