Question 1
Find the sum of first 17 terms of the AP: First term=7, common difference=7.
S_n = n/2 [2a + (n-1)d] = 17/2*[2*7+(16)*7] = 1071.0
Sum of n terms in AP: Worksheet 6 - Intermediate-Advanced Practice Sum of n terms in AP INTERMEDIATE ADVANCED
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Worksheet 6 of 10 (55% complete)
Question 2
Find the sum of first 17 terms of the AP: First term=12, common difference=3.
S_n = n/2 [2a + (n-1)d] = 17/2*[2*12+(16)*3] = 612.0
Question 3
Find the sum of first 14 terms of the AP: First term=9, common difference=7.
S_n = n/2 [2a + (n-1)d] = 14/2*[2*9+(13)*7] = 763.0
Question 4
Find the sum of first 15 terms of the AP: First term=5, common difference=7.
S_n = n/2 [2a + (n-1)d] = 15/2*[2*5+(14)*7] = 810.0
Question 5
Find the sum of first 7 terms of the AP: First term=5, common difference=4.
S_n = n/2 [2a + (n-1)d] = 7/2*[2*5+(6)*4] = 119.0
Question 6
Find the sum of first 14 terms of the AP: First term=5, common difference=5.
S_n = n/2 [2a + (n-1)d] = 14/2*[2*5+(13)*5] = 525.0
Question 7
Find the sum of first 19 terms of the AP: First term=10, common difference=3.
S_n = n/2 [2a + (n-1)d] = 19/2*[2*10+(18)*3] = 703.0
Question 8
Find the sum of first 12 terms of the AP: First term=4, common difference=8.
S_n = n/2 [2a + (n-1)d] = 12/2*[2*4+(11)*8] = 576.0
Question 9
Find the sum of first 14 terms of the AP: First term=10, common difference=7.
S_n = n/2 [2a + (n-1)d] = 14/2*[2*10+(13)*7] = 777.0
Question 10
Find the sum of first 13 terms of the AP: First term=10, common difference=8.
S_n = n/2 [2a + (n-1)d] = 13/2*[2*10+(12)*8] = 754.0
Question 11
Find the sum of first 11 terms of the AP: First term=5, common difference=6.
S_n = n/2 [2a + (n-1)d] = 11/2*[2*5+(10)*6] = 385.0
Question 12
Find the sum of first 7 terms of the AP: First term=12, common difference=5.
S_n = n/2 [2a + (n-1)d] = 7/2*[2*12+(6)*5] = 189.0
Question 13
Find the sum of first 14 terms of the AP: First term=8, common difference=2.
S_n = n/2 [2a + (n-1)d] = 14/2*[2*8+(13)*2] = 294.0
Question 14
Find the sum of first 13 terms of the AP: First term=10, common difference=4.
S_n = n/2 [2a + (n-1)d] = 13/2*[2*10+(12)*4] = 442.0
Question 15
Find the sum of first 8 terms of the AP: First term=9, common difference=3.
S_n = n/2 [2a + (n-1)d] = 8/2*[2*9+(7)*3] = 156.0
Question 16
Find the sum of first 18 terms of the AP: First term=7, common difference=7.
S_n = n/2 [2a + (n-1)d] = 18/2*[2*7+(17)*7] = 1197.0
Question 17
Find the sum of first 13 terms of the AP: First term=12, common difference=4.
S_n = n/2 [2a + (n-1)d] = 13/2*[2*12+(12)*4] = 468.0
Question 18
Find the sum of first 8 terms of the AP: First term=7, common difference=5.
S_n = n/2 [2a + (n-1)d] = 8/2*[2*7+(7)*5] = 196.0
Question 19
Find the sum of first 18 terms of the AP: First term=6, common difference=8.
S_n = n/2 [2a + (n-1)d] = 18/2*[2*6+(17)*8] = 1332.0
Question 20
Find the sum of first 11 terms of the AP: First term=10, common difference=2.
S_n = n/2 [2a + (n-1)d] = 11/2*[2*10+(10)*2] = 220.0
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