Question

3) The sum of 6th and 7th terms of an A.P
is 39 and the common difference is 3, then the
first term of AP is :
a)2
b) - 3
(c) 4
d) 3​

Answer 1

Answer:

D option

Step-by-step explanation:

(a+5d)+(a+6d) = 39

2a+11d = 39

2a+33= 39

2a = 6

a= 3

Answer 2

Answer:

given d=3 2a+11*(3)=39 2a+33=39 2a=39-33 2a=6 a=6/2 a=3 the first term of an AP is 3. ocabanga44 and 12 more users found this answer ...