Hindi, asked by shyamaspitdas4321, 10 months ago

(i) 1 + 7 +13 + 19 + ..... to 40 terms.

Answers

Answered by CᴀɴᴅʏCʀᴜsʜ

0

Answer:

a = 1

d = 6

n= 40

40th term = 1 + (40 - 1) 6

= 235

total sum = n/2( a + 40th term)

=40/2(1 + 235)

=20 × 236

=4720 Ans...

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