all formula of GP for icse board
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By GP u mean Geometric progression?
rahul1039:
yes
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Term n =ar^(n-1)
Term n from last=l÷(r^(n-1))
Sum when last term is not given,
When r=1 then sum =na
When r>1 then sum=a(r^n-1)÷(r-1)
When r<1 then sum=a(1-r^n)÷(1-r)
Sum when last term is given,
When r>1 then sum=(lr-a)÷(r-1)
When r <1 then sum=(a-lr)÷(1-r)
Term n from last=l÷(r^(n-1))
Sum when last term is not given,
When r=1 then sum =na
When r>1 then sum=a(r^n-1)÷(r-1)
When r<1 then sum=a(1-r^n)÷(1-r)
Sum when last term is given,
When r>1 then sum=(lr-a)÷(r-1)
When r <1 then sum=(a-lr)÷(1-r)
Wow a long ans
I am tired
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