Question

the 6th term oc the sequence is 12 and the sum ofthe first 6 terms is42 then what the first term and the common difference​

Answer 1

Answer:

a=2 and d=2

Step by Step explanation a+(n-1)d

12=a+5d

Sum of n terms=n/2[2a+(n-1)d]

42=3[2a+5d]

14=2a+5d

from above 2 equations

by solving we get,

2=a

So,we get 12=2+5d

d=2