Question

the first term an arithmetic sequence is 1 and the sum of the first 4 terms is 100?​

Answer 1

Answer:

You are right brother it is right answer

Answer 2

Step-by-step explanation:

a = 1 S4 = 100 n = 4

Sn =n/2{2a+(n-1)d}

Substituting everything in above equation,

2a + (4-1) × d = 50

∴ 3d = 48

∴ d = 16

First four terms are 1,17,33,49.

Hence, the answer is written above.