Question

in an AP first term is 5 and the sum of first 4 terms is one fourth of the sum of sixth to tenth terms find the sum of twenty terms of the ap ​

Answer 1

Answer:1050

Step-by-step explanation:

Answer 2

Answer:

2000

Step-by-step explanation:

2(10+3d)=1/4(5(10+9d)-3(10+5d))

20+6d=1/4(20+30d)

80+24d=20+30d

60=6d

d=10

sum of 20 terms =10(10+19(10))

=2000

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