136
+ (n-1)x
Sn=n/2[2a+(n-1)d]
Sa-20
1]
1 व 140 यांच्या दरम्यानच्या 4 ने भाग जाणा-या संख्यांची बेरीज 1
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Answer:
136
+ (n-1)x
Sn=n/2[2a+(n-1)d]
Sa-20 1]
Step-by-step explanation:
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