Math, asked by salonibhosle556, 11 months ago

Find the sum 3,7,11,....up to 40terms

Answers

Answered by Anonymous
16

Answer:

Answer:

Heya......

Here,

a= 3, n=40, d=4

Now, sum of the terms is given by the formula.

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

S40= 40/2(6+156)

S40=20×162

S40=3240

The sum is 3240.

Hope it's helpful.....

Answered by Anonymous
3

Answer:

a= 3, n=40, d=4

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

 s40= 40/2(2*3+39*4)  

s40= 40/2(6+156)

S40=20×162

S40=3240

Therefore sum upto 40 terms  is 3240.

Step-by-step explanation:

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