Math, asked by shaliniteacher1979, 3 months ago

Find the sum of 1,5,9. ....up to 25 terms

Answers

Answered by baladeb2005

5

Step-by-step explanation:

a=1

d=5-1=4

25th term=a+(n-1)d

=1+(25-1)4

=1+24*4

=1+96

=97

S25=n/2(a+l)

=25/2(1+97)

=25*98/2

=25*49

=1125

Previous Question

Next Question

Similar questions

Math, 1 month ago

if the product of zeros is f(x) =ax 2-x-4.is equal to -1 .then a=...

Biology, 1 month ago

loss of electron and proton is called 1 , Oxidation reaction 2, Reduction reation 3, redox reaction a,1 only. b, 1 &2 only c,2&3 only d,1,2&3 ...

Science, 1 month ago

what is the flavour of meat called...

Math, 3 months ago

find the smallest which we get by multiplying it with 100 to get perfect cube ...

Computer Science, 3 months ago

give the purpose of each of the following in c program 1) float2)/n3)stdio.h4)scanf...

Hindi, 10 months ago

akshay kumar ki bibi ka kya nam hai...

Hindi, 10 months ago

Mam aap sabd kaun sa sarvam me aata hai...

Math, 10 months ago

HELP If triangle DEF has a 90° angle at vertex E, which statements are true? Select two options. Triangle DEF is an obtuse triangle. The angle at vertex D is acute. The angle at vertex F is obtuse. Triangle DEF is a right triangle. The angle at vertex D is obtuse.