Arithmetic progression
Q. 1) Find the fourth term from the end in an A.P. -11,-8,-5, ........49.
Answers
Answered by
1
Answer:
total no. of terms=-11+(n-1)3=49
= n=21
fourth from last is 18 from first
-11+(17)3=40
Answered by
0
Answer:
a = -11
an = 49
a1 = -11
a2 = -8
d= a2 - a1
.°. d = -8 - (-11)
-8+11
3
an =a + (n - 1)d
=-11 + (4 - 1)3
= -11+(3)3
= -11 + 9
= -2
.°. an = -2
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