How many terms of the series 2+4+8 make the sum of equal to 1022?
Answers
Answered by
1
Answer: n=9
Step-by-step explanation:
Please do refer the image...hope it helps!
LmGoyal:
bsdk where is the answer
Answered by
1
S=n/2*[2a+(n-1)d]
1022=n/2[2*2+(n-1)2]
1022=n/2(4+2n-2)
1022=n/2(2+2n)
1022=n+n^2
0=n^2+n-1022
Now solve the quadratic equation.
Are Bhai...you did it wrong bsdk
You used the formula for AP whereas you have to use the formula for GP
And then, you will get your answer...btw I'm not a bsdk...I just study in grade 8 so I forgot to upload the pictures
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