Question

find the sum to 17 term of the square whose n term is given by 5n -4​

Answer 1

Step-by-step explanation:

first term = 5(1) - 4

= 1

second term = 5(2) - 4

= 6

common difference = d

= second term - first term

d = 6- 1 = 5

sum of 17 terms = 17/2[2( 1) + (17 - 1) 5]

= 17/2 [ 2 +80]

= 17/2 [82]

= 697