Math, asked by vinnimb66, 3 months ago

Find the sum of 4+7+10+ to 20 terms using the formula

Answers

Answered by mantikar100

1

Answer:

the answer is 12940 in two digit

Answered by hakimsarah75

1

Step-by-step explanation:

a=4

d=7-4=3

S20=n/2[2a+(n-1)d]

=20/2[2(4)+19(3)]

=10[8+51]

=10*59

=590

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