Question

In an arithmetic sequence the 5th term is 35 and 15th term is 75.find the common difference. write the algebraic from of the sequence ​

Answer 1

please refer to above attachment

Answer 2

Step-by-step explanation:

x5=35

x15=75

d=75-35/15-5

40/10=4

:.common difference =4

for finding algebra you have to see its first term.

x5=35

i.e f+4d=35

f+4×4=35

f+16=35

f=35-16

f=19.

xn=dn+(f-d)

xn=4n+(19-4)

xn=4n+15

here is your answer.....