Find the first six terms of the sequence.

a1 = -4, an = an-1 + 7

first six terms are -4, 3, 10, 17, 24 ,31

Step-by-step explanation:

The given first term and recurrence relation is

we need to find first six term of this recurrence relation

put n=2 in

since,

similarly,

for n=3

since,

For n=4

since,

For n=5

since,

For n=6

since,

Hence, first six terms are -4, 3, 10, 17, 24 ,31

c

step-by-step explanation:

6 adults and 9 children went.

a + c = 15

12a + 9c = 153

12(6) + 9(9) = 153

72 + 81 = 153