Math, asked by sheebahanis4890, 1 year ago

Pls answer this question

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Answered by ChayaNH

cant be answered because the question should have 1st term or common difference

prassupranav24: ans 32

prassupranav24: ask same question again I will ans

ChayaNH: how

prassupranav24: keep pic

sheebahanis4890: Tnku atleast u read the question, this question was taken from last mid term exam sheet in that the question was only this much

prassupranav24: I will keep photo now in my question

prassupranav24: you see

prassupranav24: ok

prassupranav24: I kept pic

prassupranav24: see frds

Answered by NeelamG

we have to find a7

and a7 = a + (7-1)d

a7 = a+ 6d.....(1)

n= 13 , S13 = 416

we know that

Sn = n/2 [ a + an]

Sn = n/2[ a+ a+ (n-1)d]

S13 = 13/2[ 2a+(13-1)d]

416 = 13/2[2a + 12d]

416 = (13/2)×2[a+6d]

416 = 13[a + 6d]

416/13 = a7 .....(from (1))

32 = a7

HENCE 7TH TERM IS a7 = 32

I HOPE IT WILL HELP U

NeelamG: i hope it helps u

sheebahanis4890: Tnku i have no words to express my tnkfullness to u, when everyone say undefined u had tell me the ans tnku neelamg

NeelamG: its my pleasure

NeelamG: @prasssupranav also give your answer

NeelamG: in his profile

sheebahanis4890: Ss i also tnk him

NeelamG: okk

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