प्रथम पद a, दूसरा पद b, और अंतिम पद c हो तो सभी पदों का योगफल क्या होगा
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bhai kuch samja nahi
HARSH958317:
mtlb
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Answer:
Step-by-step explanation:
a1=a
a2=b
an=c
Now,an=a+(n-1)d
Here a=a,an=c,d=b-a
So,
c=a+(n-1)(b-a)
n=b+c-2a
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b-a
Put this in the formula
Sn=n/2(a+an)
You will get the answer
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