the sum of 2+3½+4⅔+..... to 60 terms
formula sn= n/2[2a+(n-1)d]
Answers
Answered by
2
Answer:
Sn = 2775
Step-by-step explanation:
Given,
Sn = n/2 [ 2a + (n - 1)d ]
a = 2
d = 3½ - 2 = 7/2 - 4/2 = 3/2
n = 60
Sn = 60/2 [ 2 (2) + ( 60 - 1 ) × 3/2 ]
= 30 [ 4 + 177/2 ]
= 30 × (8 + 177) / 2
= 15 × 185 = 2775
Answered by
2
Answer:
your answer is in the attachment
Step-by-step explanation:
hope it's help you XD
Attachments:
Similar questions