Question

Answer this please i will mark you brainliest

Answer 1

Answer:

Picture1

To find 51st term

a=3

d=7-3

=4

a51= a+ 50 d

= 3+ 50(4)

= 3+200

so a51 = 203

Picture 2

To find a1 and a2

Sn= 3n +1

so, S1 = 3(1) +1= 4

also S1= a1= 4

S2= 3(2) +1 = 7

also S2 - S1 = a2

so, a2= 7-4= 3