1.2. If the first term of an A.P. is -5 and the common
difference is 2, then the sum of the first 6 terms is a
a) 0
(b) 5
c) 6
(d) 15
R [NCERT Exemp.
Answers
Answered by
0
Answer:
b
Step-by-step explanation:
6th term = a+5d
a=-5. d= 2
-5+5(2)=-5+10=5
5
Answered by
0
Answer:
a=-5
d=2
S6=?
using this formula
Sn=n/2(2a+(n-1)d)
S6=6/2(2×-5+(6-1)2)
S6=3(-10+5×2)
S6=3(-10+ 10)
S6= 3(0)
S6=0
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