if the sum of n terms of an AP is 3n^2-5n and its mth term is 164,find the value of m.
please reply fast
Daijobudesukabakka:
wanna refer the calculation ?
is my answer wrong
S2 is sum of 2 terms , not the 2nd term
nvrmind my bad
wait...
ya...i am wrong...m=82
and S2-S1 = A2
umm , my ans is coming ou to be 84 as well
no..its 82
care to explain
Answers
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i think that it will be 3n²+5n instead of 3n²-5n....
and if it is 3n²+5n then only it will be write......
but if it is 3n²-5n then ans. is comming in fraction which is not possible.....
So, friend plz. check your question....
and if it is 3n²+5n then only it will be write......
but if it is 3n²-5n then ans. is comming in fraction which is not possible.....
So, friend plz. check your question....
here, common difference comes out to be 4 not 2 ,pls check calculations
no...its 2 itself...
1st term = -2
send me your ans.
2nd term = 2
guess the cd
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Answer
The values given in the question are to be confirmed , the final answer is not a whole number if we use these values
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