Question

Which term of the arithmetic sequence: a 1; 4; 7; ... is 148

Answer 1

Answer:

common difference = d = 7 - 4 = 3. First term = a = 4 48 + 1 = n 49 = n. Hence, there are 49 terms.

Answer 2

Answer:

an = 148

a = 1

d = 3

an = a + (n-1)d

148 = 1 + (n-1)3

147/3 = n-1

49 + 1 = n

n= 50th term