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The first term of an ap …

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The first term of an ap is 2 and 9 term is 26 find the common difference

Posted by Naveen Gora 1 year, 5 months ago

Rajasthan Board > Class 10 > Mathematics

1 answers

R. S Jokers 1 year, 2 months ago

Then the first termis 2 then the 9th term is 26 Find the common difference We know that :- An=a+(n-1).d n=1 A1= a+0=2-------(1) Then n=9 A9=a+8d=26--------(2) Then By Elimination method Subtract eq(1) from (2) a+8d=26 a+0=2 8d=24 d=24/8 d=3 Puring the value of d in eqaction (2) a+8(3)=26 a+24=26 a=26-24 a=2 So the a first value is 2 And the d common difference is 3

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