From your pocket money you save rs 1 on day 1 ,rs2 on day 2 ,rs3 on 3 day and so on how much money will you save in the month of march 2008
gabru78:
given ap = 1,2,3,4........31. here t= 31. therefore tn=t31. rherefore sn=s31=? we know . sn=n/2 (t1+t2) , s31= 31/2 (1+31)= 31×32/2 = 992/2= rs 496 ans.
Answers
Answered by
18
According to the above situation ,
Total number of days in March 2008=31
So, 1+2+3+4+5+6+7+8+9+10+11+12+13+14+15+16+17+18+19+20+21+22+23+24+25+26+27+28+29+30+31
=496
So I can save Rs. too in the month of March 2008
I hope it will help you ☺
solve this in form of ap.
Answered by
31
Answer:
Step-by-step explanation:AP:1,2,3.....31
Sn=n/2 (2a+(n-1)d)
That's
S=31/2(2+30)
=496
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