How many terms of the arithmetic progression 2,5,8..Must be taken to get a sum of 392?
1 answer:
Answer:
Number of term = 48
Step-by-step explanation:
GIven:
Arithmetic progression
2,5,8..
Total sum of Arithmetic progression is 392
Find:
Number of term
Computation:
First term a = 2
Difference d = 5 - 2 = 3
Sn = [n/2][2a + (n-1)d]
392 = [n/2][2(2) + (n-1)3]
392 = [n/2][4 + 3n - 3]
784 = [n][1 + 3n]
784 = n + 3n²
3n² + n - 784
n = 48 , n = -49
Number of term = 48
You might be interested in
Answer:
-200 metre is less 450m because - 200 metre is negative.
Answer: 15 dimes and 13 nickels
Step-by-step explanation:
Chance has 90.72 grams in coins
It would be 30 degrees since a line is 180. You subtract 150 from 180 and get 30.
Convenience sample because it was easier for the researcher to go to.
