Math, asked by wildernesslover575, 10 months ago

find the sum of 7,11,15,19...upto 60 terms

Answers

Answered by firojamansuri

Answer:

the sum of 7+11+15+19+23+27+31+35+39+43+47+51+55+59 = 5,115 so this is your answer

Answered by Katherine1227

a = 7

a1 = 11

a2 = 15

d = a1 - a

= 11 - 7

= 4

S60 = n / 2 ( a + ( n-1 ) d )

= 60 /2 ( 7 + ( 60 - 1 ) 4 )

= 30 ( 7 + 59 * 4 )

= 30 ( 7 + 236 )

= 30 ( 243 )

= 7290

Hope it helps you . .

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