Find the sum of all numbers which are divisible by 9 lying between 200 to 800
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number can bee divisible those lie between 200to 800
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207, 216,225........, 792
a = 207
d = 9
L = 792
=> a +(n-1)d = 792
=> 207 +(n-1)9= 792
=> (n-1)9 = 585
=> n-1 = 65
=> n = 66
Sn = n/2 (a +L)
S66 = 33 [ 207 + 792]
= 33 * 999
= 32967
a = 207
d = 9
L = 792
=> a +(n-1)d = 792
=> 207 +(n-1)9= 792
=> (n-1)9 = 585
=> n-1 = 65
=> n = 66
Sn = n/2 (a +L)
S66 = 33 [ 207 + 792]
= 33 * 999
= 32967
gaurav2013c:
brainliest it if helped........
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