Math, asked by jinse74, 1 year ago

how many terms of the series 18+15+12+.... when added together will give 45?

Answers

Answered by rupam02

1

by sum of ap formulae n/2(2a-(n+1)d) can be used ...
I have added the negative sign because it is a decreasing ap...

rupam02: sorry the n+1 should be n-1

jinse74: can u resend i cannot see the whole steps you wrote

Previous Question

Next Question

Similar questions

English, 7 months ago

promotion and describe his legal status vis to vos ...

Chemistry, 7 months ago

Three different solution of same electrolyte and of same concentration are prepared find out which solution will have greater conductance and which have greater conductivity I) 1st solution is present between two electrodes of area of cross section 5cm² and distance between the electrodes = 2cm ii) 2nd solution between two electrodes of a = 4cm²and distance = 3 cm iii) 3rd solution between...

Chemistry, 7 months ago

A gaseous mixture contains oxygen and nitrogen in the mass ratio 8: 7. The ratio of number of molecules of oxygen: nitrogen is ________ Answer fast! Pls!

Math, 1 year ago

what number should be subtracted from -2 by 3 to get minus 1 by 6...

Math, 1 year ago

if tan theta is equal to 2 by 3 then find the value of sin square theta + cos square theta...

Math, 1 year ago

the length and the breadth of a rectangular plot are 135m and 65m .find its perimeter and the cost of fencing it at the rate of rupees 60per m...

English, 1 year ago

Meaning of Harvard.........

Math, 1 year ago

convert the following hours into minutes 1st 4 hours 2nd 5 hours...