Question

The third term of an arithmetic sequence is 25 and is fifth term is 15.what is its first term?

Answer 1

Answer:

$reward$

$1 \: rank \: = \: 50 \: rupees \: + \: rank \: of \: admin$

$2 \: rank \: = 25 \: rupees \: + \: rank \: admin$

$3 \: rank = \: 15 \: rupees$

the rupees were given by ❤️Faizan bhai ❤️

Answer 2

Answer:

Step-by-step explanation:

a3=a+(3-1)d=25

a+2d=25--(1)

a5=a+(5-1)d=a+4d=15--(2)

solve (1) and (2)

-2d=25-15=10

d=-5

a+2(-5)=25

a-10=25

a=35