if 1+4+16+64......... up to n terms=5461, Find n ?
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sum of an GP is
a(r^n-1)/(r-1)
here r is common ratio
and
a is starting term
here r is 4. a is 1
then
1*(4^n-1)÷4-1 =5461
4^n=5461*3+1
4^n =16384
4^n=128^2
2^2n =2^14
then n is 7
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a(r^n-1)/(r-1)
here r is common ratio
and
a is starting term
here r is 4. a is 1
then
1*(4^n-1)÷4-1 =5461
4^n=5461*3+1
4^n =16384
4^n=128^2
2^2n =2^14
then n is 7
###******#*#,#,%***₹
ok
ok
follow us
mark me as brainliest to get free point upto 100
ok
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