For an A.P., the first two terms are -3, 4. The 21st term is............. *
Answers
Answered by
2
Answer:-143
Step-by-step explanation:
T21=a+(n-1)d
=-3+(20)(-7)
-3+(-140)
=-3-140
=-143
Answered by
2
Answer:
137
Step-by-step explanation:
a= ‐3, d= 4‐(‐3) =7
21st term:
tn= a+(n‐1)d
t21= -3+ (21‐1)7
= ‐3+ 20×7
= ‐3+ 140
t21 = 137
therefore, the 21st term of the A.P is 137
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